Oracle Loop Select :: medcyber.com
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I have a PL/SQL statement that should iterate through a select statement, execute a stored procedure and then select something from a table. The statement looks like the one below: BEGIN FOR. There are 2 tables EMPLOYEES and DEPARTMENTS with department_id as primary key for DEPARTMENTS and foreign key on EMPLOYEES. I want to print all the employee names that belong to a particular department. I know it can be easily achieved by JOINS or EXPLICIT cursors. I thought why not try with FOR loop and a IMPLICIT cursors. My question is if it is syntactically correct to write.

FOR LOOP Statement. With each iteration of the FOR LOOP statement, its statements run, its index is either incremented or decremented, and control returns to the top of the loop. The FOR LOOP statement ends when its index reaches a specified value, or when a statement inside the loop transfers control outside the loop or raises an exception. Topics. Syntax. This Oracle tutorial explains how to use the FOR LOOP in Oracle with syntax and examples. In Oracle, the FOR LOOP allows you to execute code repeatedly for a fixed number of times. MERGE for syntax, see Oracle Database SQL Language Reference Note: Oracle Database SQL Language Reference defines DML differently. Transaction control language TCL. If you use the SELECT statement only in the cursor FOR LOOP statement, then specify the SELECT statement inside the cursor FOR LOOP statement, as in Example 6-18.

I'm trying to loop through a set of views and gather the view name and counts. I created a new table and added an ID columns. I'd like to loop through my sql statment and retrieve the values whil. Developers and DBAs get help from Oracle experts on: How to loop a select statement while inserting the values in a table. Use for loop to loop through result from a select statement. SQL> -- create demo table SQL> create table emp 2 ID VARCHAR24 BYTE NOT NULL, 3 fname VARCHAR210 BYTE, 4 lname VARCHAR210 BYTE, 5 Start_Date DATE, 6 End_Date DATE, 7 Salary Number8,2, 8 City VARCHAR210 BYTE, 9 Description VARCHAR215 BYTE 10 11 / Table created. I've always used the SELECT INTO syntax to retrieve data into variables. Lately though, I've seen the LOOP structure used. Personally, I like the SELECT INTO, it seems clear and concise to me. I didn't want to just dismiss the LOOP offhand so I ran a couple of tests. First I create my table with random strings: CREATE TABLE t AS. The loop_variable is declared implicitly during the execution of the entire loop, and the scope of this loop_variable will be only inside this loop. If the loop variable came out of the range, then control will exit from the loop. The loop can be made to work in the reverse order by adding the keyword 'REVERSE' before lower_limit.

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