Row count for tables from 2 different databases
Hi,
i wrote a query to get counts from all the tables in one schema to another schema. this generates the select count (*) from tables and gives me the counts, but i want to get the counts such as
table1 -- 100 -- DB1
table1 - 110
table2 - 230 - DB2
table2 - 230 etc...
here is my query that works but display of the output is the way i wanted. can someone help me getting the output as above described.
select 'select ''PTO'', count(*) as '||(table_name)||'_count'||' from '||table_name||';'from dba_tables
where owner = 'TEST'
union all
select 'select ''PFO'', count(*) as '||(table_name)||'_count'||' from '||table_name||';'from [email protected]
where owner = 'TEST';
thanks...
DUPLICATE post
count of rows in a schema tables
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Select query based on joining of tables from different database is taking too long
Hi Team,
Select query on table with millions of records is taking very long time. It took 50mins, the below query is joining on multiple table from two databases DB1.dbo.Table1 contains 100 million records and also Table3 and Table4 (of different database) might
contain close to 1million records.
Select T1.*
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Join Table4 CA on RTRIM(T1.Col1) + T2.Col2 = CA.Col1
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How to join tables from different databases (DBLink/DB connection )
Hello,
i have an issue and i hope you could help me to solve it. My problem is: I want to create native sql select which joins two tables from different DB (both of them are ORACLE, one of them internal, another one - external). I have found several notes and posts, but without any success. Db connection exists in dbcon table, so this part of my problem has been solved.
I would like something like that:
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i can not split this select into two separate ones, because both tables store over 30 mln. entries and i do not want to create any copies of them.
Br,
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Volker -
Dealing with tables from different databases?
Hi. I'm a newbie to Visual Studio 2012 and stuck on how to interact with different datasets.
I am building a report that is associated with with two tables, each from a different database. The
master_flat table with the primary key matter_number is from the first database and it contains all the columns I need that should show up in the report layout I've built. However,
billing_table with the primary key matter_number contains a flag that I go by which I must use to determine whether each matter should come through in the reporting or not.
I've set the master_flat as dataset1 and the billing_table as dataset2. Now, what is the best way in Visual studio 2012 to filter by the matters that has flag "N" in dataset2?
ThanksWe are way out of sync. Lets synchronize. I'm not sure which question you are refering to. Is it the "C# or VBnet" question or is it the "One or two database Question". It seem like it would be the database question since you
should know which programming language you are using.
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SQL working in SSMS.
If you let me know if you are using VBnet or C# I will write a simple LINQ. Even better if you supply me the names of the columns of the two tables.
jdweng -
Get row count for different tables to the same line
How can I get the row count for different tables in one line:
SELECT count(A), count(B), count(C) from table tb_a A , tb_b B, tb_c C;
Thanks!>
Hi,
How can I get the row count for different tables in one line:
SELECT count(A), count(B), count(C) from table tb_a A , tb_b B, tb_c C;Something like this? One of the many uses for CTE's - Common Table Expressions - AKA
subquery refactoring. Worth getting to know - very handy!
with acount as
select count(*) as counta from dual -- put your table name here
bcount as
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ccount as
select count(*) as countc from dual -- put your table name here
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Paul...
Edited by: Paulie on 25-Jul-2012 17:44 -
How to create a view consisting of data from tables in2 different databases
Using Oracle 10.2g
I have 2 databases Gus and haggis on Comqdhb schema.
glink indicates a databse link between Haggis and Gus
In Gus there are tables student,subject,grade,school containing columns like upn...
STUDENT
upn
academicYear
SUBJECT
subject
GRADE
examlevel
grade
SCHOOL
sn
In HAGGIS there are tables student,grade,teacher containing columns upn...desc below.
STUDENT
upn
GRADE
grade
upn
academicyear
level
Create view in your HAGGIS database which will join all of the exam grades together. You should have one view which will produce the following relation :
examGrade(upn, subject, examlevel, sn, grade,academicYear)
so I need to create a view which gets the data from both the tables in both the databases.
create view as examGrade(upn, subject, examlevel, sn, grade,academicYear) as select s.upn
But i am not getting how to select a column from 2 tables in different databases
I mean if i said
select upn from comqdhb.student@glink,comqdhb.student;
select upn from comqdhb.student@glink,comqdhb.student
ERROR at line 1:
ORA-00918: column ambiguously defined
help me out,Thank you.Thank you for the reply will follow up the code format
Create views in your HAGGIS schema database which will join all of the exam grades together. You should have one view which will produce the following relation :
examGrade(upn, subject, examlevel, sn, grade,academicYear)
I understand that there wont be duplication when we use conditions
If i query
select count(upn)
from comqdhb.student@glink I get 9000
but after the union
create view examGrade(upn, subject, examlevel, sn, grade,academicYear)
as
select distinct s.upn as upn
, g.subject as subject
, g."LEVEL" as examlevel
, g.grade as grades
, '9364097'
, to_number(g.academicyear) as academicyear
from comqdhb.student s
, comqdhb.grade g
where s.upn=g.upn
union
select s.upn
, sb.subject
, g.elevel
, g.grade
, s.acyr
, sc.sn
from comqdhb.subject@glink sb
, comqdhb.student@glink s
, comqdhb.gradevalues@glink g
, comqdhb.school@glink sc,
, comqdhb.studentingroup@glink sg
, comqdhb.teachinggroup@glink tg
where sb.sid=tg.sid
and tg.gid=sg.gid
and sg.upn=s.upn
and g."LEVEL"=tg.elevel
and s.school=sc.id
and sc.id=tg.id; returns
count(upn) from exam gradeIt gets stuck actually sometimes it returns
932002 some results.
2:
Another problem i am having which i am trying to solve and written up my ideas but haven't been getting the expected results.Hope you can help.Thank you.
Information:
=======
All children take exams at the age of 16 called a General Certificate of SecondaryEducation (GCSE).
They have to study and take exams in Mathematics, English and Science, and can take other subjects such as History, French, Art etc. Most students will study between 5 and 10 different subjects before taking their GCSEs.
For each exam, a student is awarded a grade from A*, A, B,C,D,E,F,G,U,X An A* grade is the best grade achievable and an X is the worst grade.
In order to analyze how students have performed, each grade is mapped to a numeric value as follows:
Grade Numerical score
A* 8
A 7
B 6
C 5
D 4
E 3
F 2
G 1
U 0
X 0
Now why i need this avgGCSE is because i have to create a view containing avgGCSE of the students it is used in the next question where a condition is avgGCSE is between 6.5 and 7
In order to calculate the avgGCSE the idea is to calculate the grades of the students and map the grades to their corresponding scores/values
add them all up and div by the total no of grades to get the avg.
desc comqdhb.STUDENT@glink;
STUDENT
=======
UPN
FNAME
CNAME
DOB
GENDER
PREVIOUSSCHOOL
XGCSE
SCHOOL
ACYR
STUDENTINGROUP
=============
UPN
GID
STARTDATE
ENDDATE
GRADE
GRADEVALUES
===========
GRADE
LEVEL
VALUE
I have a opinion that xgcse in STUDENT table refers to the avgGCSE which i want to calculate as when i asked my professor as to what xgcse he said that he forgot to take it out of the table and it is not necessary while creating avggcse.
select *
from comqdhb.student@glink
where xgcse<6.5; Displaying a result
returns:
UPN FAMILYNAME COMMONNAME DATEOFBIR GENDER PREVIOUSSCHOOL XGCSE SCHOOL ACYR
===========================================================================
1011 KIMBERLY ABBOT 07-JUL-79 f none 3.93500948 2 2
select *
from comqdhb.student@glink
where xgcse between 6.5 and 7 and upn = 1386; Displaying a result
returns:
UPN FAMILYNAME COMMONNAME DATEOFBIR GENDER PREVIOUSSCHOOL XGCSE SCHOOL ACYR
===========================================================================
1386 STEPHANIE AANNESSON 15-JAN-79 f none 6.88873 2 2 so if xgcse is the avgGCSE then upn 1011 has avggcse<6.5 and 1386 has avggcse >6.5
my idea was backward strategy like so now if we find out upn 1368 has suppose xgcse(avggcse)>6.5 how to extract the avggcse for the particular upn We need to map grades from GRADEVALUES to grade in STUDENTINGROUP and map upn from studentingroup to upn in student to output the values for the corresponding grades from GRADEVALUES
select grade
from comqdhb.studentingroup@glink
where upn = 1011;
Result:
GRADE
=====
D
F
B
E
C
E
E
B
8 rows selected. Mapping each grade to the corresponding value and calculating we get
32/8=4 total(values to corresponding grades)/no of grades.
But the xgcse for upn 1011 is 3.935 and i am getting 4!! maybe xgcse isn't avggrade but ? is the procedure by me correct for calculating avggcse
select grade
from comqdhb.studentingroup@glink
where upn = 1386;
Result:
GRADE
======
A*
A*
A*
A*
B
A*
A*
A
B
B
B
11 rows selected. grade to the corresponding value and calculating we get
79/11=7.12 total(values to corresponding grades)/no of grades.
But the xgcse for upn 1011 is 6.88... and i am getting 7.12!!
But another problem
when i say
select g.value,g.grade
from comqdhb.gradevalues@glink g
, comqdhb.studentingroup@glink sg
where g.grade=sg.grade
and sg.upn=1011;
result:
======
VALUE GRADE
===========
100 B
100 B
80 C
60 D
40 E
40 E
40 E
20 F
6 B
6 B
5 C
VALUE GRADE
=============
4 D
3 E
3 E
3 E
2 F
16 rows selected.
select distinct g.value,g.grade
from comqdhb.gradevalues@glink g
, comqdhb.studentingroup@glink sg
where g.grade=sg.grade
and sg.upn=1011;
result:
======
VALUE GRADE
============
2 F
100 B
6 B
3 E
60 D
5 C
4 D
80 C
40 E
20 F
10 rows selected. I am getting only 8 for the query
select grade
from comqdhb.studentingroup@glink
where upn = 1386; here its becomming 10 and also its displaying values as 100 and ...
select distinct *
from comqdhb.gradevalues@glink;
GRADEVALUES
===========
LEVEL GRADE VALUE
================================
a A 120
a B 100
a C 80
a D 60
a E 40
a F 20
a U 0
a X 0
g A 7
g A* 8
g B 6
LEVEL GRADE VALUE
================================
g C 5
g D 4
g E 3
g F 2
g G 1
g U 0
g X 0
18 rows selected. I was hoping if i could map the grades and get the values and calculate avggrade by total(values)/count(values)that would be it but here there are values like 100...
select sum(g.value)/count(g.grade) as avggrade
from comqdhb.gradevalues@glink g
, comqdhb.studentingroup@glink sg
where g.grade=sg.grade
and sg.upn=1386;
avggrade
========
37.4375 the avggrade cant be this big and when i map each grade i obtained for 1368 like a to 7+b to 6 so on i get avggrade 7.12
kindly help.
Edited by: Trooper on Dec 15, 2008 4:49 AM -
How to get row count(*) for each table that matches a pattern
I have the following query that returns all tables that match a pattern (tablename_ and then 4 digits). I also want to return the row counts for these tables.
Currently a single column is returned: tablename. I want to add the column RowCount.
DECLARE @SQLCommand nvarchar(4000)
DECLARE @TableName varchar(128)
SET @TableName = 'ods_TTstat_master' --<<<<<< change this to a table name
SET @SQLCommand = 'SELECT [name] as zhistTables FROM dbo.sysobjects WHERE name like ''%' + @TableName + '%'' and objectproperty(id,N''IsUserTable'')=1 ORDER BY name DESC'
EXEC sp_executesql @SQLCommandThe like operator requires a string operand.
http://msdn.microsoft.com/en-us/library/ms179859.aspx
Example:
DECLARE @Like varchar(50) = '%frame%';
SELECT * FROM Production.Product WHERE Name like @Like;
-- (79 row(s) affected)
For variable use, apply dynamic SQL:
http://www.sqlusa.com/bestpractices/datetimeconversion/
Rows count all tables:
http://www.sqlusa.com/bestpractices2005/alltablesrowcount/
Kalman Toth Database & OLAP Architect
SQL Server 2014 Design & Programming
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Fetch data from different database tables
Hi...
How can i fetch data from different database tables and put it into a internal table and then display it??? Can provide simple short codes as i'm new to ABAP. Thanks.Hi,
Check this sample code..
TYPE-POOLS: slis.
DATA: BEGIN OF itab OCCURS 0,
vbeln TYPE vbeln,
expand,
END OF itab.
DATA: BEGIN OF itab1 OCCURS 0,
vbeln TYPE vbeln,
posnr TYPE posnr,
matnr TYPE matnr,
netpr TYPE netpr,
END OF itab1.
DATA: t_fieldcatalog TYPE slis_t_fieldcat_alv.
DATA: s_fieldcatalog TYPE slis_fieldcat_alv.
s_fieldcatalog-col_pos = '1'.
s_fieldcatalog-fieldname = 'VBELN'.
s_fieldcatalog-tabname = 'ITAB'.
s_fieldcatalog-rollname = 'VBELN'.
s_fieldcatalog-outputlen = '12'.
APPEND s_fieldcatalog TO t_fieldcatalog.
CLEAR: s_fieldcatalog.
s_fieldcatalog-col_pos = '1'.
s_fieldcatalog-fieldname = 'VBELN'.
s_fieldcatalog-tabname = 'ITAB1'.
s_fieldcatalog-rollname = 'VBELN'.
s_fieldcatalog-outputlen = '12'.
APPEND s_fieldcatalog TO t_fieldcatalog.
CLEAR: s_fieldcatalog.
s_fieldcatalog-col_pos = '2'.
s_fieldcatalog-fieldname = 'POSNR'.
s_fieldcatalog-tabname = 'ITAB1'.
s_fieldcatalog-rollname = 'POSNR'.
APPEND s_fieldcatalog TO t_fieldcatalog.
CLEAR: s_fieldcatalog.
s_fieldcatalog-col_pos = '3'.
s_fieldcatalog-fieldname = 'MATNR'.
s_fieldcatalog-tabname = 'ITAB1'.
s_fieldcatalog-rollname = 'MATNR'.
APPEND s_fieldcatalog TO t_fieldcatalog.
CLEAR: s_fieldcatalog.
s_fieldcatalog-col_pos = '4'.
s_fieldcatalog-fieldname = 'NETPR'.
s_fieldcatalog-tabname = 'ITAB1'.
s_fieldcatalog-rollname = 'NETPR'.
s_fieldcatalog-do_sum = 'X'.
APPEND s_fieldcatalog TO t_fieldcatalog.
CLEAR: s_fieldcatalog.
DATA: s_layout TYPE slis_layout_alv.
s_layout-subtotals_text = 'SUBTOTAL TEXT'.
s_layout-key_hotspot = 'X'.
s_layout-expand_fieldname = 'EXPAND'.
SELECT vbeln UP TO 100 ROWS
FROM
vbak
INTO TABLE itab.
IF NOT itab[] IS INITIAL.
SELECT vbeln posnr matnr netpr
FROM vbap
INTO TABLE itab1
FOR ALL ENTRIES IN itab
WHERE vbeln = itab-vbeln.
ENDIF.
DATA: v_repid TYPE syrepid.
v_repid = sy-repid.
DATA: s_keyinfo TYPE slis_keyinfo_alv.
s_keyinfo-header01 = 'VBELN'.
s_keyinfo-item01 = 'VBELN'.
CALL FUNCTION 'REUSE_ALV_HIERSEQ_LIST_DISPLAY'
EXPORTING
i_callback_program = v_repid
is_layout = s_layout
it_fieldcat = t_fieldcatalog
i_tabname_header = 'ITAB'
i_tabname_item = 'ITAB1'
is_keyinfo = s_keyinfo
TABLES
t_outtab_header = itab
t_outtab_item = itab1
EXCEPTIONS
program_error = 1
OTHERS = 2.
IF sy-subrc <> 0.
* MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
* WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
ENDIF.
Thanks
Naren -
Row/column counter for tables
Hello,
I know this is very basic, but so far examples I dug up don't really anything remotely to what I want.
I have 3 databases. Well they are defined as "connections" in SQLDeveloper I hope that's the same I am still not used to Oracle abstractions.
Each has several tables. All I want is loop through each of the 3 DBs and log row count and table count.
Say DB1:
Rows: Columns:
Table1: x y
Table2: x y
I don't really care what's inside them. I found one example that did it but it listed some system tables that aren't part of my db. Changing "owner" didn't really help.
From the value of the variable "Owner" means a database, is that correct?
Oh and I also don't care if the code is "inefficient", tables aren't that big.
Thanks in advance.
Edited by: 940349 on Jun 14, 2012 6:22 AMnot sure what you are planning to achieve, but you can use below query to get owner of table, table name , column name, number of tables by owner and number of column in a table (belonging to owner). This will require access to dba_tab_columns.
select owner,table_name,count(*) over(partition by owner) count_table,column_name,count(*) over(partition by owner,table_name) count_column from dba_tab_columns; -
Problem w/: Error while getting estimated row count for view
JDev 10.1.3 - Steps
1. created a ADF VO w/ one bind variable vNAME.
2. Created a basic jspx page, use the data control pal. to drop in VO w/ executeparam option. Use the data control pal to drop in VO w/ ADF Read-Only Table w/ select and sort option. Selected all VO columns in table.
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oracle.jbo.DMLException: Error while getting estimated row count for view object CategoryView, statement SELECT count(1) FROM (SELECT
CATEGORY.CATID CATID,
CATEGORY.NAME NAME,
CATEGORY.PICTURE PICTURE,
CATEGORY.ACTIVE ACTIVE
FROM
CATEGORY
WHERE
(CATEGORY.NAME LIKE UPPER(:vName)||'%')) .
Tested SQL Statement in SQL Worksheet works ok (with a Value replacing ':vName').
Can anyone advise - seems to be a straight forward process that is returning this error msg. I have tried variations of the SQL stmt with no luck. The jspx page errors when the ADF Read-Only Table is added.I seem 2 have the same error, in a slightly different situation.
I have a view which subclasses a Entity with a history column 'CreatedOn'. When performing a quick search/filter on this column I get the same error. The ADF app is build on a DB2 database, so no named parameters here. Instead invalid SQL is created when executing the estimated row count. The WHERE clause contains 'CreatedOn = null', should be 'CreatedOn is null'. Furthermore the input of my quick search is not filled in this clause.
Any help would be appreciated -
There was an error while updating row count for "SH".."SH".CHANNELS
Hi All,
Am new to OBIEE.Pls help in this regard.
Am building the physical layer as per Repository guide.When am importing the data in to this,am getting the below error.
*"There was an error while updating row count for "SH".."SH".CHANNELS" :"*
channles is the table name and having 5 rows.
but am able to see the data in the sql prompt. like SELECT * FROM SH.CHANNELS then 5 rows data would be displaying..
pls help in this regard and where is the excat problem?
Thanks,what is the error?
Make sure that your connection pool settings are okay..
Make sure that, you are using correct driver in case of if you are using ODBC dsn..
Also make sure that, your oracle server is running... TNS and Oracle server services -
Accessing tables from different schema in CDS and AMDP
Hi All,
We are working on a HANA system which has several schema replicated from SAP R/3/Non SAP systems. We have BW 7.4 SP9 deployed on the same system and accessing the HANA views using latest BW virtual objects such as Open ODS , Composite providers etc.
We are also using the BW system for few ABAP based data processing developments. We are currently accessing HANA views in ABAP programs by creating dictionary views based on external HANA views.
We would like to however use recent possibilities of CDS and AMDP for better life cycle management of ABAP based solutions. The open SAP course on this subject was of very good help. Thanks a lot "open SAP team" for that. I would however have few open questions,
As I understand AMDP gives us full flexibility of writing sql procedures within ABAP development environment, but can we access tables from different schema into AMDP code. If yes, then sample code would help.
If the answer of first question is yes, then how do we manage transports between development and production systems where the schema names would be different. Currently in open HANA developments, such transport is manged using Schema mapping.
Can I also use different schema tables in CDS views.
We are updating few tables in ABAP dictionary after applying processing logic in ABAP program as detailed in step 1. With the new approach using AMDP, can we directly update database schema tables which will give us an optimization advantage.
New ABAP HANA program interfaces are quite promising and we would like to use them to optimize many data intensive applications.
Thanks & Regards,
AnilHi Anil,
I can only answer 1. and 2. (and would be interested into 3. as well):
1.
Yes you can access tables from a different schema and also HANA views. In this case no 'using' is needed.
Examples:
RESULT = SELECT
FROM
"SAP_ECC"."T441V" AS t,
"_SYS_BIC"."tmp.package/AFPO" AS a.
WHERE ...
2. In this case, if you need schema mapping: You could use HANA (projection) views which just forward to a different schema, also see example.
Best regards,
Christoph -
Single query to get data from different databases
i need to capture certain fields from certain tables in database 1 and certain fields from certain tables in database 2 into one file using a single SQL statement.
i tried searching on the net
i found that dblinks can help
but iam not sure if ill be able to create dblinks in my situation which is:
i need to get data from oracle to be copied to mysql
this is not a replication acitivity, but i need certain fields from one database and certain from the other
so what iwas thinking is, if i use an sql query to get all the fields (i need around 40) from the different oracle databases and create a singlefile with one insert per select, i can then read that file into mysql
instead of creating multiple sql queries for each table and creating separate files and eventually separate tables in mysql.
can anyone help me here?
or maybe suggest another approach.
thanksHi,
I think dblink is the only option available to get data from different databases. It will work for your case too.
CREATE DATABASE LINK db_link CONNECT TO user_name IDENTIFIED BY password USING 'instance_name'you must have the system privilege 'create database link' to create db links. This way you can get the required data and put it in a table in oracle. But i dont know how to put this data from oracle table to Mysql.
HTH
Muneer -
What is te best way to copy a table from a database to another?
Hello friends:
I have two databases: an Access database and an Oracle database. I must copy the data from al tables from the Access database to the oracle database. The tables in the both databases are equal (number of columns, type, etc).
I read an resultset from acces (select * from table1) and I insert every row in the Oracle database with an while loop (while (r.next)...). It works fine when there are a few rows, but I have a table with over 200000 rows, and when I'm copying the row number 30.000, the system goes very slow...
How can I copy tables from a database to another more quickly?
Thanks!CASE #1
The most efficient method would be to copy all the rows from Microsoft Access and write them to a text file using Access's native interface (not JDBC), then use Oracle's SQL Loader utility (not JDBC) to insert the data.
You can insert 200,000 rows of 80 bytes each in 30 seconds or less even on a modest Oracle system using SQL Loader. The extract from Access is very dependent on the size of the CPU and the available memory.
Hint 1: Avoid explicit or implict network traffic.
Hint 2: Extract and load from local drives rather than networked or shared drives on other services
Please note that this is done for efficiency of load, but has issues related to error checking, and operational scripting.
Anything else you do or use will be slower than the method (above).
CASE #2
If you want to integrate this into a single JDBC program which will provide better operational management of the process, then you can simply connect to both databases in your Java program, then read the rows one at a time from Access, insert them using the Batch mechanism of JDBC to Oracle. You will also want to set the FetchSize in Oracle to a larger value then the default (i.e set it to 100 vs 10).
Hint #3 You may want to look into alternative JDBC drivers for accessing MS Access, rather than the JDBC-ODBC bridge which is not optimized for MS Access. You may also want to consider using the OCI8 driver from Oracle rather than the thin driver. Both provide Type 4 functionality but I have heard (not experienced) that the OCI8 driver is better for managing batch style of processing like yours
Good luck!
Joel -
Help needed to insert data from different database
Hi ,
I have a requirement where i need to fetch data from different database through database link .Depending on user request , the dblink needs to change and data from respective table from mentioned datbase has to be fetched and populated .Could i use execute immediate for this, would dblink work within execute immediate .If not , could pls let me know any other approach .What does "the dblink needs to change" mean?
Are you trying to dynamically create database links at run-time? Or to point a query at one of a set of pre-established database links at run-time?
Are you sure that you really need to get the data from the remote database in real time? Could you use materialized views/ Streams/ etc to move the data from the remote databases to the local database? That tends to be far more robust.
Justin
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