TheDROP TABLE IF EXISTSstatement is misused due to wrong understanding of its syntax. Possible Causes The operations performed byDROP TABLE IF EXISTSare as follows: Check whether a table exists on the current CN. If it does, deliver theDROPcommand to other CNs and DNs. If it does not, no...
syntaxsql -- Syntax for SQL Server, Azure SQL Database, Warehouse in Microsoft FabricDROPTABLE[IFEXISTS] {database_name.schema_name.table_name|schema_name.table_name|table_name} [ ,...n ] [ ; ] syntaxsql -- Syntax for Azure Synapse Analytics and Parallel Data WarehouseDROPTABLE{database...
DROPTABLEtable_name;DROPTABLE[IFEXISTS] table_name; DROP TABLE table_name;删除一个名为 table_name的表 DROP TABLE IF EXISTS table_name;执行了这条语句如果存在table_name表就删除,不存在不会报错也是执行。 mysql> show tables; +---+ | Tables_in_database_name | +---+ | table_name | +--...
In order to remove existing tables, you use the MySQLDROP TABLEstatement. The syntax of theDROP TABLEis as follows: DROP [TEMPORARY] TABLE [IF EXISTS] table_name [, table_name] ... [RESTRICT | CASCADE] TheDROP TABLEstatement removes a table and its data permanently from the database. I...
'drop table ' || TAB_NAME_IN ||' purge'; end If; end DROPEXITSTABS;
and in this case the level, as mentioned in the DROP TABLE Syntax chapter of the manual, is merely a note. It can be argued either way as to whether or not one cares to know whether the table actually existed, so this is purely an informational message for those who may in fact care...
1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'varchcar(240), pr_require varchar(240), pr_function v' at line 11 1146 - Table 'backstage.rg_product' doesn't exist ...
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Description: The DROP syntax supports the IF EXISTS argument which makes it possible to drop tables if they exist, however the ALTER syntax does not support this for its DROP COLUMN syntax. One should be able to do mysql> ALTER TABLE tmp_table DROP COLUMN IF EXISTS tmp_column; Which ...
Syntax drop_table::= Description of the illustration drop_table.eps Semantics IF EXISTS Specifying IF EXISTS drops the table if it exists. Using IF NOT EXISTS with DROP TABLE results in ORA-11544: Incorrect IF EXISTS clause for ALTER/DROP statement. schema Specify the schema containing ...