SQL Developer dropping first column in a SQL SELECT

Am not too certain who to report this to... but I just noticed that SQL Developer will not return the first column in a SELECT statement when there is a comment just after the SELECT reserved word when running the query in the SQL Worksheet. For instance:
SELECT -- > HEADER INFORMATION STARTS HERE <--
w.stu_id HDR_STU_ID,
w.wiser_id HDR_WISER_ID,
iep.wiep_id HDR_WIEP_ID,
sis.wisis_id HDR_WISIS_ID,
FROM wiser_exit exit
INNER JOIN wiser w
ON exit.wiser_id = w.wiser_id
INNER JOIN wiser_iep iep
ON w.wiser_id = iep.wiser_id
INNER JOIN vw_wiser_iep_sis sis
ON iep.wiep_id = sis.wiep_id
will just return columns 2 - 4 (HDR_WISER_ID, HDR_WIEP_ID, and HDR_WISIS_ID), and NOT column HDR_STU_ID.
I verified this by running the same query in SQL Commands in the SQL Workshop of APEX, and the resultset returned all the columns including HDR_STU_ID.
Just ran another quick test in SQL Developer, and get the same results from a SELECT against a single table:
SELECT -- > HEADER INFORMATION STARTS HERE <--
county_cd,
odd_even_flg,
street_name
FROM dime
Did not return the county_cd column.
I know, it's just a minor quirk, but I thought I would mention it.

John,
Thank you. I replaced the '--' comments with the '/*' '*/' style and it picked up the first column.
I guess I'll just have to break an old habit I've been doing for years for comments. Dang, I hope all that old code doesn't break...
Thomas
Spoke too soon. I followed up by checking what Oracle's 'Oracle Database 10g The Complete Reference' had to say about the issue of using '--' for comments and under '-- (Comment)' it says "-- tells oracle a comment has begun. Everything from that point to the end of the line is treated as a comment. These delimiters are used only within SQL itself or in PL/SQL ..."
So I guess I can continue using '--', but need to keep in mind that in certain circumstances it might not work as expected. YMMV
Edited by: Thomas 8246 on Feb 19, 2010 8:09 PM

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SQL Loader Inserts chr(13) and chr(10) in the first column of every row.

Hi,
I have exported a data in a pipe delimited file using TOAD in one database. Now I want to load the data in my local database using SQL Loader. However every time I try to load the data a double quote followed by a new line is entered for the first column of each row. Unfortunately the delimited file is very big and hence can't be posted here. However I tried the same with a customized table and its data and found the same problem. Below are the table structures and control file that I used.
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a varchar2(30),
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insert into test_sql values('51146263',sysdate-3);
insert into test_sql values('51146261,sysdate-1);
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CONTROL FILE_
OPTIONS(SKIP=1)
LOAD DATA
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PRESERVE BLANKS
INTO TABLE TEST_SQL1
FIELDS TERMINATED BY '|' OPTIONALLY ENCLOSED BY '"'
TRAILING NULLCOLS
A CHAR(2000),
B DATE "MM/DD/YYYY HH12:MI:SS AM"
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Hi Harry,
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Regards,
Prithwish

SQL SELECT DROPPING LEADING ZEROS

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SQL> desc pa_Students;
Name Null? Type
ID NOT NULL NUMBER(22)
SQL> select distinct id from pa_students;
ID
2841
2843
2846
2861
2867
2873
2890
2892
2903
9 rows selected.
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TO_CHAR(ID,'000000000')
000002841
000002843
000002846
000002861
000002867
000002873
000002890
000002892
000002903
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LPAD(ID,9,'0')
000002841
000002843
000002846
000002861
000002867
000002873
000002890
000002892
000002903
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How many columns a sql selects

I need to find out how many columns are in a sql statement like below:
sql = "select id, decode(description,'','No decription', description), comment from my_table";
The sql string is build dynamically so I don't know it when I write the code. I need to know before I do
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Thanks inadvance.
Botao

You can use the interface ResultSetMetaData,below are some methods of it.
int getColumnCount()
Returns the number of columns in this ResultSet object.
String getColumnName(int column)
Get the designated column's name.
int getColumnType(int column)
Retrieves the designated column's SQL type.
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Using column number inplace of column name in SQL Select statement

Is there a way to run sql select statements with column numbers in
place of column names?
Current SQL
select AddressId,Name,City from AddressIs this possible
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user10962462 wrote:
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v_v_val     VARCHAR2(4000);
v_n_val     NUMBER;
v_d_val     DATE;
v_ret       NUMBER;
c           NUMBER;
d           NUMBER;
col_cnt     INTEGER;
f           BOOLEAN;
rec_tab     DBMS_SQL.DESC_TAB;
col_num     NUMBER;
v_rowcount NUMBER := 0;
BEGIN
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c := DBMS_SQL.OPEN_CURSOR;
-- parse the SQL statement into the cursor
DBMS_SQL.PARSE(c, p_sql, DBMS_SQL.NATIVE);
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d := DBMS_SQL.EXECUTE(c);
-- Describe the columns returned by the SQL statement
DBMS_SQL.DESCRIBE_COLUMNS(c, col_cnt, rec_tab);
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FOR j in 1..col_cnt
LOOP
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FOR j in 1..col_cnt
LOOP
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                                                                              when 2 then 'NUMBER'
                                                                              when 12 then 'DATE'
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EMPNO - NUMBER
ENAME - VARCHAR2
DEPTNO - NUMBER
SAL - NUMBER
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EMPNO : 7782
ENAME : CLARK
DEPTNO : 10
SAL : 2450
Row: 2
EMPNO : 7839
ENAME : KING
DEPTNO : 10
SAL : 5000
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EMPNO : 7934
ENAME : MILLER
DEPTNO : 10
SAL : 1300
PL/SQL procedure successfully completed.
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EMPNO - NUMBER
ENAME - VARCHAR2
JOB - VARCHAR2
MGR - NUMBER
HIREDATE - DATE
SAL - NUMBER
COMM - NUMBER
DEPTNO - NUMBER
Row: 1
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ENAME : CLARK
JOB : MANAGER
MGR : 7839
HIREDATE : 09/06/1981 00:00:00
SAL : 2450
COMM :
DEPTNO : 10
Row: 2
EMPNO : 7839
ENAME : KING
JOB : PRESIDENT
MGR :
HIREDATE : 17/11/1981 00:00:00
SAL : 5000
COMM :
DEPTNO : 10
Row: 3
EMPNO : 7934
ENAME : MILLER
JOB : CLERK
MGR : 7782
HIREDATE : 23/01/1982 00:00:00
SAL : 1300
COMM :
DEPTNO : 10
PL/SQL procedure successfully completed.
SQL> exec run_query('select * from dept where deptno = 10');
-- Columns --
DEPTNO - NUMBER
DNAME - VARCHAR2
LOC - VARCHAR2
Row: 1
DEPTNO : 10
DNAME : ACCOUNTING
LOC : NEW YORK
PL/SQL procedure successfully completed.
SQL>

ORA-12983: cannot drop all columns in a table

Hi,
I am creating a table with two columns.
I have modified a column as unused using ALTER statement.
After that i have tried to drop the another column by using ALTER statement.
But it throws an error ORA-12983: cannot drop all columns in a table.
is it not possible to achieve this via ALTER statement?
thanks

is there any other way to find the name of the columns which have been marked as unused?Don't think so, and you would not be able to do much about. You won't be able to reference it, you won't be able to un-unuse it, and you would even be able to add a new column having same name.
Why are you using SET UNUSED in the first place?
Regards
Peter
Quoting myself:
You won't be able to reference itMaybe not good enough:
SQL> select column_name, data_type, segment_column_id
from user_tab_cols
where table_name = 'T';
COLUMN_NAME                    DATA_TYPE   SEGMENT_COLUMN_ID
SYS_C00001_11051618:28:14$     NUMBER                      1
B                              NUMBER                      2
SYS_C00003_11051618:28:14$     NUMBER                      3
3 rows selected.
select "SYS_C00003_11051618:28:14$" from t
Error at line 1
ORA-00904: "SYS_C00003_11051618:28:14$": invalid identifier
SQL> alter table t drop column "SYS_C00001_11051618:28:14$";
Table altered.
SQL> select column_name, data_type, segment_column_id
from user_tab_cols
where table_name = 'T';
COLUMN_NAME                    DATA_TYPE   SEGMENT_COLUMN_ID
B                              NUMBER
1 row selected.
Note: Both columns "disappeared" Thanks MichaelS
Edited by: Peter on May 16, 2011 9:29 AM

Dropping unused columns from database table

I have an existing table called TUSER. I have mapped some fields, but not
all fields, as some are inserted by other applications and for reporting
purposes.
I am using JDK 1.3.1_02, Windows 2000, SQL Server 2000 database, Kodo
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15:33:22 JST 2002 ] ALTER TABLE TUSER ADD Job_Title_ID VARCHAR(255)
[java] [ connection: 2961925; statement: 1582473; time: Thu Jul 04
15:33:22 JST 2002 ] ALTER TABLE TUSER DROP COLUMN MAILUSERID
[java] [ connection: 2961925; statement: 5237832; time: Thu Jul 04
15:33:22 JST 2002 ] ALTER TABLE TUSER DROP COLUMN PHONENUMBERS
[java] [ connection: 2961925; statement: 2191491; time: Thu Jul 04
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[java] [ connection: 2961925; statement: 894443; time: Thu Jul 04
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[java] [ connection: 2961925; statement: 531758; time: Thu Jul 04
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[java] [ connection: 2961925; statement: 5899013; time: Thu Jul 04
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[java] [ connection: 2961925; statement: 8146001; time: Thu Jul 04
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[java] [ connection: 2961925; statement: 7756310; time: Thu Jul 04
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[java] [ connection: 2961925; statement: 6817858; time: Thu Jul 04
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[java] [ connection: 2961925; statement: 7754670; time: Thu Jul 04
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[java] [ connection: 2961925; statement: 7332084; time: Thu Jul 04
15:33:24 JST 2002 ] ALTER TABLE TUSER DROP COLUMN MSG_SERVER
[java] [ connection: 2961925; statement: 1691809; time: Thu Jul 04
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[java] [ connection: 2961925; statement: 5253969; time: Thu Jul 04
15:33:24 JST 2002 ] ALTER TABLE TUSER DROP COLUMN REG_DATE
[java] [ connection: 2961925; statement: 4977422; time: Thu Jul 04
15:33:24 JST 2002 ] ALTER TABLE TUSER DROP COLUMN PERMIT_LST
[java] [ connection: 2961925; statement: 4343712; time: Thu Jul 04
15:33:24 JST 2002 ] ALTER TABLE TUSER DROP COLUMN ALLOWREPL
[java] [ connection: 2961925; statement: 7104150; time: Thu Jul 04
15:33:24 JST 2002 ] ALTER TABLE TUSER DROP COLUMN EMAIL
[java] [ connection: 2961925; statement: 4395840; time: Thu Jul 04
15:33:24 JST 2002 ] ALTER TABLE TUSER DROP COLUMN MANAGERSTATUS
[java] [ connection: 2961925; statement: 2417379; time: Thu Jul 04
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[java] [ connection: 2961925; statement: 2865120; time: Thu Jul 04
15:33:25 JST 2002 ] ALTER TABLE TUSER DROP COLUMN SMTPADDRESS
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('com.gulfnet.g
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Thanks in advance.
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Can we convert a SQL (Select Statement) to Procedure.?

Hi
I am using a select sql for retrieving the results - Below is a sample sql select query.
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TableB.COLUMN1 PROCESS,
TableC.COLUMN1 PRODUCT,
sum(TableC.COLUMN4) as OPEN_INSTANCES
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and      TableA.COLUMN2      = TableC.COLUMN2
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Sreekant wrote:
select TableC.DATEFIELD as QUERY_DATE,
TableB.COLUMN1 PROCESS,
TableC.COLUMN1 PRODUCT,
sum(TableC.COLUMN4) as OPEN_INSTANCES
from      TableA, TableB, TableC
where TableB.COLUMN1      = TableA.COLUMN2
and      TableA.COLUMN2      = TableC.COLUMN2
and      DATEFIELD <= to_date('2011-02-02' ,'YYYY-MM-DD')
and      DATEFIELD >= to_date('2011-02-02' ,'YYYY-MM-DD')
and      TableC.COLUMN4 <= (24 * 3600 )
and      TableB.COLUMN1 like 'PROCESSID'
and      TableC.COLUMN1 in ('OSRCITR')
group by TableC.DATEFIELD as QUERY_DATE,
TableA.COLUMN1 PROCESS,
TableC.COLUMN1 PRODUCT
I believe if we use a Procedure, It would be much faster. Is there any way that we can convert the above select sql to a procedure. If yes, how can it be.Using the code tags would make the query easier to read :)
What version of Oracle are you on?
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Try tuning the query first. Get an execution plan. Things you can look for include
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Hi All,
Can anyone help me converting this Sql select statement to oracle ....
-----------------------------------------Query--------------------------------------------------------------
select emp_master.emp_code ,
emp_master.dept_cd ,
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attendance_master.linked_column ,
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end ,
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then dateadd(mm,1,location.next_pay_date)
else location.next_pay_date
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end as PaymentDate               ,
isnull(grade_master.leave_type,'C') ,
eDocsNetEmployeesLeave.StartDate ,
eDocsNetEmployeesLeaveDetails.LeaveType
from eDocsNetEmployeesLeave ,
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eDocsNetLeaveTypes ,
emp_master ,
grade_master ,
attendance_master ,
location
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eDocsNetEmployeesLeave.EmployeeID = emp_master.emp_code and
eDocsNetEmployeesLeaveDetails.LeaveType = eDocsNetLeaveTypes.LeaveTypeID and
eDocsNetLeaveTypes.loc_cd = emp_master.loc_cd and
location.loc_cd = emp_master.loc_cd and
attendance_master.loc_cd = emp_master.loc_cd and
attendance_master.linked_column = eDocsNetLeaveTypes.LinkedAttendance and
grade_master.loc_cd = emp_master.loc_cd and
grade_master.grade_cd = emp_master.grade_cd and
eDocsNetEmployeesLeaveDetails.RequestID      = @RequestID
order by eDocsNetEmployeesLeaveDetails.StartDate
Thanks in Advance
Smiley

Seems like you want to convert a SQL statement from the ??? dialect to the Oracle dialect. *(It would be useful to indicate the non-ANSI standard SQL you are starting with.)
Part of the problem is that you use several date related functions. Some are unnecessary in Oracle and some need to translated into Oracle functions as found in the Functions section (chapter 5) of the SQL Reference manual at http://www.oracle.com/pls/db102/homepage
Note that columns and expressions of type 'date' in ORacle always contain all of "yyyy mm dd hh mi ss" and you need to format and trauncate as necessary.
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Dropping a column in composite xmltype table with virtual column

Hello,
i found some interesting behavior. I have a table with xmltype column and a virtual column. If i drop a column, which has an index smaller than the index for the xmltype column, than the virtual column reference for xmltype column is not changed.
select * from v$version;
drop table t_xml purge;
create table t_xml( c1 number,
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                    cxml xmltype,
                    c3 number,
                    xmlflag number as (nvl2(cxml,1,0)));
select * from t_xml;
alter table t_xml drop column c2;
select * from t_xml; The 2nd select will result in error:
SQL> select * from v$version;
BANNER
Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production
PL/SQL Release 11.2.0.1.0 - Production
CORE    11.2.0.1.0      Production
TNS for IBM/AIX RISC System/6000: Version 11.2.0.1.0 - Production
NLSRTL Version 11.2.0.1.0 - Production
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Tabelle wurde geändert.
SQL>
SQL> select * from t_xml;
select * from t_xml
FEHLER in Zeile 1:
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Hi,
Please try this code:
loop at int_inv into wa_inv.
    lv_count = lv_count + 1.
    AT END OF posnr.   <------- The field you want to sum..
      gs_total-posnr      = wa_inv-posnr.
      gs_total-cov_total = lv_count.
      APPEND gs_total TO gt_total.
      CLEAR : gs_total,
              lv_count,
              wa_inv.
    ENDAT.
ENDLOOP.

Why should primary key be the first column in a table

Hi,
I'm trying to build a case to alter a table in production with a composite key . I have PK columns at the start of table which is how it should be , but the issue is down the line , another column was added at the end and the same was added to composite
key .
issue is as PK arranges records physically where it creates a clustered index, as far as my knwoledge goes, data is ordered initially by the three fields (composite keys) and then ordered again by another composite key field as they are not
defined in a set , will this cause any performance bottle necks as it's a stage table to populate a fact if so how ??
below is the table structure..
Any help in this regard is appreciated :)

PRIMARY KEY as first column is just a convention.
The PRIMARY KEY columns can be anywhere in a table.
I don't see any advantage to the 5-column PRIMARY KEY.
I would design it with INT IDENTITY (or SEQUENCE OBJECT) SURROGATE PRIMARY KEY.
You can make the 5-columns a UNIQUE key or unique index.
Kalman Toth Database & OLAP Architect
Free T-SQL Scripts
New Book / Kindle: Exam 70-461 Bootcamp: Querying Microsoft SQL Server 2012

Dropping Unused column

Hi All,
I am working on version 11.2.0.3.0 ( windows server 2008 ).
While dropping unused column i am getting below error
SQL> create table er (ab varchar2(50), aa varchar2(50)) compress;
SQL> alter table er set unused column ab;
Table altered.
SQL>
SQL>
SQL>
SQL>
SQL> alter table er drop unused columns;
alter table er drop unused columns
ERROR at line 1:
ORA-39726: unsupported add/drop column operation on compressed tables

i can't do such things for these number of tablesThat is the funniest thing I've heard in a while. If you can "alter table xxx drop unused columns," why can't you do what is suggested.
And no, it's not a bug.
And no, there is not "another way around"

Drop Multi-columns

SQL> alter table TIME_RULES drop column
2 ( VAC_TYPE ,DEC_FLAG ,BAL_VAL , CHK_WORK , CHK_AGE
3 , BAL_ACC ); --, , , , ;
( VAC_TYPE ,DEC_FLAG ,BAL_VAL , CHK_WORK , CHK_AGE
ERROR at line 2:
ORA-00904: : invalid identifier
Any Suggestions pls.?
Regards,
Abdetu..

Remove the COLUMN Key work.
SQL> select * from v$version
2 /
BANNER
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Prod
PL/SQL Release 10.2.0.1.0 - Production
CORE    10.2.0.1.0      Production
TNS for 32-bit Windows: Version 10.2.0.1.0 - Production
NLSRTL Version 10.2.0.1.0 - Production
Elapsed: 00:00:00.00
SQL> create table t(a integer, b integer, c integer)
2 /
Table created.
Elapsed: 00:00:00.00
SQL> desc t
Name                                      Null?    Type
A                                                  NUMBER(38)
B                                                  NUMBER(38)
C                                                  NUMBER(38)
SQL> alter table t drop (b,c)
2 /
Table altered.
Elapsed: 00:00:00.01
SQL> desc t
Name                                      Null?    Type
A                                                  NUMBER(38)Thanks,
Karthick.

Dropping a column's default value

How to drop a column's default value?
The following commands fails:
ALTER TABLE t1 ALTER COLUMN c1 DROP DEFAULT.
ALTER TABLE t1 MODIFY c1 DROP DEFAULT.
Thanks in advance.

SQL> ALTER TABLE IDENTIFICADORES_DOMINIOS_RANGO MODIFY TIPO_DATO DEFAULT NULL;
Table altered
SQL> DESC IDENTIFICADORES_DOMINIOS_RANGO
Name                 Type         Nullable Default Comments
CODIGO_IDENTIFICADOR NUMBER(7)
DESCRIPCION          VARCHAR2(50)
TIPO                 VARCHAR2(1)
TIPO_DATO            VARCHAR2(1)           NULL    Tipo de dato que contiene el Dominio-RangoI would like drop DEFAULT value; now, it's marked like NULL. It's not the same... is it?

SQL Developer dropping first column in a SQL SELECT

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