Cursor for updating a column plsql tyler perry dating anyone
The column values returned by the subquery are assigned to the columns in the column list in order. WHERE search_condition Chooses which rows to update in the database table.
The first value is assigned to the first column in the list, the second value is assigned to the second column in the list, and so on. Only rows that meet the search condition are updated.
If you omit this clause, all rows in the table are updated.
In this chapter, we will discuss the cursors in PL/SQL. A cursor holds the rows (one or more) returned by a SQL statement.
DECLARE 2 CURSOR C1 IS SELECT EMP_CODE, EMP_SALARY FROM EMP; 3 BEGIN 4 FOR I IN C1 5 LOOP 6 UPDATE EMP_SAL 7 SET EMP_SALARY = I. EMP_CODE; 9 END LOOP; 10 END; 11 / PL/SQL procedure successfully completed.SET column_name = (subquery3) Assigns the value retrieved from the database by list.The subquery must return exactly one row that includes all the columns listed.In such a case, an another approach with bulk collectiong in chunks is required.-- EDIT --- how to store sequence values ------- I assume that the table create or replace PROCEDURE pro_cedure( p_dept_id number ) IS TYPE changed_table_type IS TABLE OF changed%ROWTYPE; changed_buff changed_table_type; BEGIN SELECT deptno, comm, extra, sequence_name.nextval BULK COLLECT INTO changed_buff FROM emp WHERE comm IS NULL AND extra IS NOT NULL AND deptno = p_dept_id FOR UPDATE; UPDATE emp SET comm = extra WHERE comm IS NULL AND extra IS NOT NULL AND deptno = p_dept_id; FORALL i IN 1 ..
Search for cursor for updating a column plsql:
Whenever you alter the value of a column referenced by the -- All the employees except the manager of -- department (WORKDEPT) 'E21' have been temporarily reassigned.