I do not prefer to use cursors as they are slow and will impact performance. As a good practice I always try not to use cursors in my sql code. But, how to loop through table rows without
Can we optimise While Loop in sql server for large number of data? Can we pass parameters to the trigger?(Beginner) Can we RAISERROR inside MERGE Statement Can we select Bottom 1000 rows of a database Table from SSMS 2008 R2? Can we set value in a variable inside a select statement...
I want to use a cursor in stored procedure as nested stored procedure call as below code. Is it possible? Could you correct me how to write code? --- declare cursor cursor for SELECT proc_sample_recordset('param'); DECLARE CONTINUE HANDLER FOR NOT FOUND SET quitLoop = TRUE; OPEN...
PL/SQL procedure successfully completed SQL> select * from zrp; STR --- updateD ABCXEFG ABCYEFG updateD ABCZEFG 0000000 6 rows selected SQL> 隐式cursor示例二: begin for rec in (select gsmno,status from gsm_resource) loop dbms_output.put_line(rec.gsmno||'--'||rec.status); end loop...
SQL Server Cursor as Output of a Stored Procedure SQL Server Cursor Current of Example SQL Server Cursor Alternative with a WHILE Loop This tip provides sample code that can be used to expand SQL Server cursor options beyond the syntax in this tip. ...
A cursor that is declared in a stored procedure returns a result set when all of the following conditions are true: The cursor is declared with the WITH RETURN option. In a distributed environment, blocks of each result set of the cursor's data are returned with the CALL statement reply. ...
In Cursor by it means its an iterating process of resultant record. if we run a query and we want some checks on retrieved records or wants to loop through each row of resultant query we will use Cursors. Another terminology is stored procedures. by names it is a procedure stored on dat...
A cursor loop is running in a stored procedure (looping through server and drive letters). In the loop it calls a stored procedure that does the following:DBCC CHECKIDENT (zstblACLSStage,RESEED,0)SET @strSQL = 'INSERT INTO zstblACLSStage(LN) SELECT LN = RTRIM(LTRIM(REPLACE(F1,CHAR(9)...
cursor get_gsmno_cur (p_nettype in varchar2) is select gsmno from gsm_resource where nettype=p_nettype and status='0'; v_gsmno number; begin open get_gsmno_cur('138'); loop fetch get_gsmno_cur into v_gsmno; exit when get_gsmno_cur%notfound; ...
Even this clumsy WHILE loop is blisteringly fast in comparison to the SQL Server cursor approach. It takes less than a second but is closer to 800ms than 87ms as is the case for the pure set-based query. Conclusion People are right to loath cursors. If it becomes normal for you to ...