Traversal of Oracle stored procedures

The following content mainly introduces Oracle Stored procedure , How to use for Loop through the spliced SQL sentence , And implement .

1. The cycle of writing
   notes ： For the sake of brevity , In the following code block “SQL sentence ” Of SQL It will be shown below .

FOR ARR IN (SQL sentence ) LOOP 

--  Console printing （ During the official run , It is suggested to delete or comment ）
DBMS_OUTPUT.PUT_LINE(ARR.SS);
	
--  perform sql
EXECUTE IMMEDIATE ARR.SS;

END LOOP; 

Don't tangle with the following statement , Just see what you like . Mainly to express the final implementation SQL How did you get it .（ Splicing sql You cannot add a semicolon at the end of a statement , Otherwise execution sql Will make mistakes ）

SELECT 'UPDATE SCHOOL_ROll SET ROLL = '|| S.ROLL || 'WHERE ID = ' || S.ID FROM STUDNETS AS S

2. Complete stored procedure statements

CREATE 
	OR REPLACE PROCEDURE "SP_OA_SL" AS BEGIN
	
	--  Traverse SQL Execution results 
	FOR ARR IN ( SQL sentence  ) LOOP
		
		--  Console printing （ During the official run , It is suggested to delete or comment ）
		DBMS_OUTPUT.PUT_LINE ( ARR.SS ); 
		
        --  perform sql
	    EXECUTE IMMEDIATE ARR.SS;
	
    END LOOP;
END;