drop table if exists oracle
DECLARE
existing_table number;
BEGIN
SELECT count(*) into existing_table FROM ALL_TABLES
WHERE TABLE_NAME = 'table_name' AND OWNER = 'owner';
IF existing_table = 1 then
EXECUTE IMMEDIATE 'DROP TABLE owner.table_name';
END IF;
END;
/
CREATE TABLE owner.table_name (BDAY DATE, [...]);oracle sql drop column if exists
DECLARE
l_cnt NUMBER;
BEGIN
SELECT COUNT(*) INTO l_cnt
FROM dba_tab_columns
WHERE owner = 'my_owner'
AND table_name = 'my_table' AND column_name = 'my_column';
IF( l_cnt = 1 ) THEN
EXECUTE IMMEDIATE 'ALTER TABLE my_table DROP COLUMN my_column';
END IF;
END;Copyright © 2021 Codeinu
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