Can we use rownum in procedures?

Hi,
Can we use rownum in procedures"
Thanks and regards
Gowtham Sen.

here is some examples that might be of help.
SQL> set serveroutput on;
SQL> create or replace procedure get_employee(p_empno number) as
2    cursor c1(pEmpNo number) is
3     select e.rn, e.empno, e.ename
4       from (select rownum rn, empno, ename
5               from emp
6             order by empno) e
7      where e.empno = pEmpNo;
8 begin
9    for c1_rec in c1(p_empno) loop
10      dbms_output.put_line('The rownum is '||to_char(c1_rec.rn));
11      dbms_output.put_line('The employee name is '||c1_rec.ename);
12    end loop;
13 end;
14 /
Procedure created.
SQL> execute get_employee(7788);
The rownum is 8
The employee name is SCOTT
PL/SQL procedure successfully completed.
SQL> execute get_employee(7654);
The rownum is 5
The employee name is MARTIN
PL/SQL procedure successfully completed.
SQL>

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hi all,
i am facing a strange problem
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[email protected]

How Can I use Mysql's PROCEDURE by Java Can you give me sample???

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DECLARE mystr VARCHAR(20);
DECLARE mycnt INTEGER(2);
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SET mycnt = 0;
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IF mycnt = 0 THEN
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select mystr;
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12.2. Control Flow Functions
CASE value WHEN [compare_value] THEN result [WHEN [compare_value] THEN result ...] [ELSE result] END
CASE WHEN [condition] THEN result [WHEN [condition] THEN result ...] [ELSE result] END
The first version returns the result where value=compare_value. The second version returns the result for the first condition that is true. If there was no matching result value, the result after ELSE is returned, or NULL if there is no ELSE part.
mysql> SELECT CASE 1 WHEN 1 THEN 'one'
-> WHEN 2 THEN 'two' ELSE 'more' END;
-> 'one'
mysql> SELECT CASE WHEN 1>0 THEN 'true' ELSE 'false' END;
-> 'true'
mysql> SELECT CASE BINARY 'B'
-> WHEN 'a' THEN 1 WHEN 'b' THEN 2 END;
-> NULL
The default return type of a CASE expression is the compatible aggregated type of all return values, but also depends on the context in which it is used. If used in a string context, the result is returned as a string. If used in a numeric context, then the result is returned as a decimal, real, or integer value.
Note: The syntax of the CASE expression shown here differs slightly from that of the SQL CASE statement described in Section 17.2.10.2, �gCASE Statement�h, for use inside stored routines. The CASE statement cannot have an ELSE NULL clause, and it is terminated with END CASE instead of END.
IF(expr1,expr2,expr3)
If expr1 is TRUE (expr1 <> 0 and expr1 <> NULL) then IF() returns expr2; otherwise it returns expr3. IF() returns a numeric or string value, depending on the context in which it is used.
mysql> SELECT IF(1>2,2,3);
-> 3
mysql> SELECT IF(1<2,'yes','no');
-> 'yes'
mysql> SELECT IF(STRCMP('test','test1'),'no','yes');
-> 'no'
If only one of expr2 or expr3 is explicitly NULL, the result type of the IF() function is the type of the non-NULL expression.
expr1 is evaluated as an integer value, which means that if you are testing floating-point or string values, you should do so using a comparison operation.
mysql> SELECT IF(0.1,1,0);
-> 0
mysql> SELECT IF(0.1<>0,1,0);
-> 1
In the first case shown, IF(0.1) returns 0 because 0.1 is converted to an integer value, resulting in a test of IF(0). This may not be what you expect. In the second case, the comparison tests the original floating-point value to see whether it is non-zero. The result of the comparison is used as an integer.
The default return type of IF() (which may matter when it is stored into a temporary table) is calculated as follows:
Expression Return Value
expr2 or expr3 returns a string string
expr2 or expr3 returns a floating-point value floating-point
expr2 or expr3 returns an integer integer
If expr2 and expr3 are both strings, the result is case sensitive if either string is case sensitive.
Note: There is also an IF statement, which differs from the IF() function described here. See Section 17.2.10.1, �gIF Statement�h.
IFNULL(expr1,expr2)
If expr1 is not NULL, IFNULL() returns expr1; otherwise it returns expr2. IFNULL() returns a numeric or string value, depending on the context in which it is used.
mysql> SELECT IFNULL(1,0);
-> 1
mysql> SELECT IFNULL(NULL,10);
-> 10
mysql> SELECT IFNULL(1/0,10);
-> 10
mysql> SELECT IFNULL(1/0,'yes');
-> 'yes'
The default result value of IFNULL(expr1,expr2) is the more �ggeneral�h of the two expressions, in the order STRING, REAL, or INTEGER. Consider the case of a table based on expressions or where MySQL must internally store a value returned by IFNULL() in a temporary table:
mysql> CREATE TABLE tmp SELECT IFNULL(1,'test') AS test;
mysql> DESCRIBE tmp;
-------------------------------------------+
| Field | Type | Null | Key | Default | Extra |
-------------------------------------------+
| test | char(4) | | | | |
-------------------------------------------+
In this example, the type of the test column is CHAR(4).
NULLIF(expr1,expr2)
Returns NULL if expr1 = expr2 is true, otherwise returns expr1. This is the same as CASE WHEN expr1 = expr2 THEN NULL ELSE expr1 END.
mysql> SELECT NULLIF(1,1);
-> NULL
mysql> SELECT NULLIF(1,2);
-> 1
Note that MySQL evaluates expr1 twice if the arguments are not equal.
Previous / Next / Up / Table of Contents
User Comments
Posted by I W on July 12 2005 5:52pm [Delete] [Edit]
Don't use IFNULL for comparisons (especially not for Joins)
(example:
select aa from a left join b ON IFNULL(a.col,1)=IFNULL(b.col,1)
It's terrible slow (ran for days on two tables with approx 250k rows).
Use <=> (NULL-safe comparison) instead. It did the same job in less than 15 minutes!!
Posted by [name withheld] on November 10 2005 12:12am [Delete] [Edit]
IFNULL is like oracle's NVL function (these should help people searching for NVL() ..)
Posted by Philip Mak on May 26 2006 7:14am [Delete] [Edit]
When using CASE, remember that NULL != NULL, so if you write "WHEN NULL", it will never match. (I guess you have to use IFNULL() instead...)
Posted by Marc Grue on June 24 2006 2:03pm [Delete] [Edit]
You can ORDER BY a dynamic column_name parameter using a CASE expression in the ORDER BY clause of the SELECT statement:
CREATE PROCEDURE `orderby`(IN _orderby VARCHAR(50))
BEGIN
SELECT id, first_name, last_name, birthday
FROM table
ORDER BY
-- numeric columns
CASE _orderby WHEN 'id' THEN id END ASC,
CASE orderby WHEN 'desc id' THEN id END DESC,
-- string columns
CASE orderby WHEN 'firstname' THEN first_name WHEN 'last_name' THEN last_name END ASC,
CASE orderby WHEN 'descfirst_name' THEN first_name WHEN 'desc_last_name' THEN last_name END DESC,
-- datetime columns
CASE _orderby WHEN 'birthday' THEN birthday END ASC,
CASE orderby WHEN 'desc birthday' THEN birthday END DESC;
END
Since the CASE expression returns the "compatible aggregated type of all return values", you need to isolate each column type in a separate CASE expression to get the desired result.
If you mixed the columns like
CASE _orderby
WHEN 'id' THEN id
WHEN 'first_name' THEN first_name
...etc...
END ASC
.. both the id and first_name would be returned as a string value, and ids would be sorted as a string to '1,12,2,24,5' and not as integers to '1,2,5,12,24'.
Note that you don't need a "ELSE null" in the CASE expressions, since the CASE expression automatically returns null if there's no match. In that case, you get a "null ASC" in your ORDER BY clause which doesn't affect the sort order. If for instance orderby is 'descfirst_name', the ORDER BY clause evaluates to:
ORDER BY null ASC, null DESC, null ASC, first_name DESC, null ASC, null DESC
Effectively the same as "ORDER BY first_name DESC". You could even add a new set of CASE expressions for a second order column (or more..) if you like.
Add your own comment.

What is that post supposed to be?

Can I use a stored procedure to validate a username and password?

We are using Discoverer on a standalone server but we have a database link to our reporting database.
Our standalone Discoverer is on a 10g database with a database link. Our reporting database is an 9i database using oracle applications. I have a stored procedure that i can call to validate username and password in the apps.
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thanks
Angie

Michael.
Let's rewind this discussion for a sec as I have not the faintest idea what you're referring to with the dblinks, query prediction, etc.
I didn't think that was the main thrust of the thread and thought it was if the user could validate a username and password. If they happen to use a dblink, that's another issue.
1. What I"m referring to as good design is the concept of the eul$ triggers that Discoverer offers (the link offered by the user before my response).
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One use I can forsee is setting up an environment or table everytime one enters Discoverer. Or maybe some cleanup after Discoverer is exited (ie: delete that setup table).
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What do I think about 'em? Don't know ... don't care. Haven't had to work with them too much and until that point comes - I'm not worried about them either way.
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Hi Skif,
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action callExternalProc2() : DecimalFloat[]
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A transaction rollback may have left the object in an inconsistent state.
exception 40183:
repository/base/activation/activator.cpp:884
Transaction rollback detected. Activation failed.
When i commented the above codes, the activation will be successful.
And the procedure can execute in SQL console.
Can you give me some suggestions?

Hi Omer,
I tried to create my stored procedure in another schema(owned by my user), but I still can't active the rdl file.
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I think this maybe the reason for the error message "A transaction rollback may have left the object in an inconsistent state." .
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HamidHelal wrote:
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SQL> begin
2      dbms_output.put_line('Before return');
3      return;
4      dbms_output.put_line('After return');
5 end;
6 /
Before return
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SQL> create or replace
2    procedure p1
3      is
4      begin
5          dbms_output.put_line('Before return');
6          return;
7          dbms_output.put_line('After return');
8 end;
9 /
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Before return
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SQL> begin
2      dbms_output.put_line('Before return');
3      return 99;
4          dbms_output.put_line('After return');
5 end;
6 /
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PLS-00372: In a procedure, RETURN statement cannot contain an expression
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2    procedure p1
3      is
4      begin
5          dbms_output.put_line('Before return');
6          return 99;
7          dbms_output.put_line('After return');
8 end;
9 /
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5/9      PLS-00372: In a procedure, RETURN statement cannot contain an
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Checking online help, I do not see any possibility.
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-> execute

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Why I Can't use procedure in select statement

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Hi, Salah.
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Can't use bcp in SQL Server procedure

I need to export data of sales between the last 4 years to a csv using a stored procedure, however the output of that just gives User
name not provided, either use -U to provide the username or use -T for Trusted Connection, then it gives the possible parameters to
give to the command. What am I typing wrong? I've double checked the servername and i'm using -T.
select
dateSales, Sales
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from
dbo.Sales
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Unfortunately I can't reproduce it in my local.
I tried belwo 2 in SSMS and also in Command prompt and both worked -
EXEC xp_cmdshell 'bcp "select * from ##temp" queryout "C:\temp\sales.csv" -c -T'
EXEC xp_cmdshell 'bcp "select * from ##temp" queryout "C:\temp\sales.csv" -c -T -S localhost'
My BCP is inside C:\Program Files\Microsoft SQL Server\100\Tools\Binn.
Few things to check:
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Try running the bcp from SSMS and CMD both. If it runs from CMD then SQL Server account has no permissions
Do consider reading Permissions, Remarks section given in below:
https://msdn.microsoft.com/en-us/library/ms162802.aspx
-Vaibhav Chaudhari

HT201412 I try to update IOS 6 to my ipad 2 and after half of the procedure stopped ... then I try to reconnected to the itunes and say "iTunes has detected an iPad in recovery mode. You must restore this iPad before it can be used with iTunes". Can every

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Can we use rownum in procedures?

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