Oracle if updating then Chat4free with girls

If the Boolean expression evaluates to false, then the first set of code after the end of the if statement (after the closing end if) will be executed.

The Oracle UPDATE statement is used to update existing records in a table in an Oracle database.

This is a pretty common situation that comes up when performing database operations.

A stored procedure is called and the data needs to be updated if it already exists and inserted if it does not.

If we refer to the Books Online documentation, it gives examples that are similar to: IF EXISTS (SELECT * FROM Table1 WHERE Column1='Some Value') UPDATE Table1 SET (...) WHERE Column1='Some Value'ELSE INSERT INTO Table1 VALUES (...) This approach does work, however it might not always be the best approach.

This will do a table/index scan for both the SELECT statement and the UPDATE statement.

Of those, the majority are related to people misunderstanding the order of the timing points and how they are affected by bulk-bind operations and exceptions.

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.

VALUE(1000000,9999999)); r3 NUMBER := CEIL(DBMS_RANDOM. VALUE(1000000,9999999)); r4 NUMBER := CEIL(DBMS_RANDOM. VALUE(1000000,9999999)); r5 NUMBER := CEIL(DBMS_RANDOM. VALUE(1000000,9999999)); BEGIN CASE tbl WHEN 0 THEN INSERT INTO scale_write_0 (id1, id2, id3, id4, id5) VALUES ( d1, r2, r3, r4, r5); WHEN 1 THEN INSERT INTO scale_write_1 (id1, id2, id3, id4, id5) VALUES ( d1, r2, r3, r4, r5); WHEN 2 THEN INSERT INTO scale_write_2 (id1, id2, id3, id4, id5) VALUES ( d1, r2, r3, r4, r5); WHEN 3 THEN INSERT INTO scale_write_3 (id1, id2, id3, id4, id5) VALUES ( d1, r2, r3, r4, r5); WHEN 4 THEN INSERT INTO scale_write_4 (id1, id2, id3, id4, id5) VALUES ( d1, r2, r3, r4, r5); WHEN 5 THEN INSERT INTO scale_write_5 (id1, id2, id3, id4, id5) VALUES ( d1, r2, r3, r4, r5); END CASE; RETURN 'insert'; END; FUNCTION run_delete(tbl IN NUMBER, d1 IN NUMBER) RETURN VARCHAR2 AS BEGIN CASE tbl WHEN 1 THEN DELETE FROM scale_write_1 WHERE id1 = d1; WHEN 2 THEN DELETE FROM scale_write_2 WHERE id1 = d1; WHEN 3 THEN DELETE FROM scale_write_3 WHERE id1 = d1; WHEN 4 THEN DELETE FROM scale_write_4 WHERE id1 = d1; WHEN 5 THEN DELETE FROM scale_write_5 WHERE id1 = d1; ELSE NULL; END CASE; IF SQL%ROWCOUNT 0 THEN RETURN 'delete'; ELSE RETURN NULL; END IF; END; FUNCTION run_update_all(tbl IN NUMBER, d1 IN NUMBER) RETURN VARCHAR2 AS r2 NUMBER := CEIL(DBMS_RANDOM.

In most standard approaches, the following statement will likely provide better performance.

It will only perform one table/index scan instead of the two that are performed in the previous approach.

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