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If your boss really insist on keyword EXIST, try this: select count(*) into c from user_tables where EXIST (select null from user_tables where table_name = upper('continent'));:-) –
26 lis 2009 · DROP TABLE IF EXISTS `table_name`; This way, if the table doesn't exist, the DROP doesn't produce an error, and the script can continue. Does Oracle have a similar mechanism? I realize I could use the following query to check if a table exists or not. SELECT * FROM dba_tables where table_name = 'table_name';
5 kwi 2014 · In a .SQL script, where you're running DDL to DROP and/or CREATE various objects, the Oracle standard is to drop the object, and ignore the error in cases where the object does not exist. If you wish, you can write code to check if the object exists (see DBA_OBJECTS view) to only drop if it exists.
Oracle Database 23c introduced the DROP TABLE IF EXISTS syntax. This is the easiest way to drop a table only if it exists: DROP TABLE IF EXISTS t1; That statement drops the table called t1 if it exists. If the table doesn’t exist, the statement runs without error.
Use the DROP TABLE statement to drop a blockchain or immutable table. It is recommended that you include the PURGE option while dropping these tables. Dropping a blockchain or immutable table removes its definition from the data dictionary, deletes all its rows, and deletes any indexes and triggers defined on the table.
Summary: in this tutorial, you will learn how to use the Oracle DROP TABLE statement to remove an existing table. Introduction to Oracle DROP TABLE statement. To move a table to the recycle bin or remove it entirely from the database, you use the DROP TABLE statement: DROP TABLE schema_name.table_name [CASCADE CONSTRAINTS | PURGE]; Code ...
19 sty 2024 · Learn about the best ways to drop table if exists in Oracle if it exists. Oracle does not support the “IF EXISTS” clause, but there are several alternative solutions to achieve the same result. Find out how to use exception handling, the “WHENEVER SQLERROR ” command, and more to drop a table in Oracle if it exists.
