Start Oracle if updating

Oracle if updating

The IF statement associates a condition with a sequence of statements enclosed by the keywords THEN and END IF.

where employee_id = i_employee_id; if sql%rowcount = 0 then -- no rows were updated, so the record does not exist insert into employees ( ... ); end if; end; When any SQL statement is executed in PLSQL, the SQL%ROWCOUNT variable will contain the number of rows affected (in this case updated) by the most recent query. The MERGE statement takes a list of records which are usually in a staging table, and adds them to a master table.

In this case, if it contain zero, it means the update failed to find any rows to update and therefore the record needs to be inserted instead. If the record exists in the master table, it should be updated with the new values in the staging table, otherwise insert the record from the staging table.

create or replace PACKAGE test_write_scalability IS TYPE piped_output IS RECORD ( idxes NUMBER , cmnd VARCHAR2(255) , seconds NUMBER , id1 NUMBER); TYPE piped_output_table IS TABLE OF piped_output; FUNCTION run(n IN number) RETURN test_write_scalability.piped_output_table PIPELINED; END; create or replace PACKAGE BODY test_write_scalability IS TYPE tmp IS TABLE OF piped_output INDEX BY PLS_INTEGER; FUNCTION run_insert(tbl IN NUMBER, d1 IN NUMBER) RETURN VARCHAR2 AS r2 NUMBER := CEIL(DBMS_RANDOM.

CREATE or REPLACE TRIGGER emp_after_insert AFTER INSERT ON emp FOR EACH ROW DECLARE BEGIN insert into emp_backup values (:new.empid, :new.fname, :new.lname); DBMS_OUTPUT.

Many shops are replacing their platter-style disks with solid-state disks, and creating a very small data buffer, just for the updates.

The book Oracle Tuning: The Definitive Reference notes that if you are still using traditional disks, many shops segregate high-updates objects (tables & indexes) into a separate blocksize so that they can have a separate, small data buffer."By segregating high activity tables into a separate, smaller data buffer, Oracle has far less RAM frames to scan for dirty block, improving the throughput and also reducing CPU consumption.

Syntax for IF-THEN statement is − If the Boolean expression condition evaluates to true, then the block of code inside the if statement will be executed.