Try to change a value in the description column to NULL. This fails. 尝试把这一行的description列设置为空值。结果失败了。 SQLUPDATE Production.CategoriesTest SET description = NULL WHERE categoryid = 8; GO Alter the table and
ALTERTABLEtable_nameALTERCOLUMNcolumn_name [type_name] [NULL|NOTNULL] [COLLATEcollation_name] example: This example demonstrates how to change an existing table column’s nullability and data type.The Gender column in the HumanResources.Employeetable is originally NOT NULL and the original data typ...
change check checksum column columns comment constraint create cross current_date current_time current_timestamp data database databases date datetime day day_hour day_minute day_second dayofmonth dayofweek dayofyear dec decimal default delayed delay_key_write delete desc describe distinct distinctrow doub...
sp_change_agent_parameter 參數變更命令 變更代理程式設定檔 sp_changearticle sp_changearticlecolumndatatype sp_changedistpublisher sp_changedistributiondb(變更散布資料庫) sp_changedistributor_password sp_changedistributor_prope...
sp_change_agent_parameter sp_change_agent_profile sp_changearticle sp_changearticlecolumndatatype sp_changedistpublisher sp_changedistributiondb sp_changedistributor_password sp_changedistributor_property sp_changedynamicsnapshot_job sp_changelogreader_agent sp_changemergearticle sp_changemerge...
Introduction One of my colleagues was asked me about problem finding incorrect data but their problem is this column is Char type and find incorrect rows by date type. Solution For example, have one table: CREATE TABLE #test (c1 char(8) NULL) INSERT #test VALUES ...
4:Changing a Column Definition The syntax for doing this is as follows: ALTERTABLEtable_nameALTERCOLUMNcolumn_name [type_name] [NULL|NOTNULL] [COLLATEcollation_name] example: This example demonstrates how to change an existing table column’s nullability and data type.The Gender column in the ...
This lesson shows you how to create a database, create a table in the database, and then access and change the data in the table.
EXEC sys.xp_sprintf @ret_string OUTPUT, '@@columnName = %s has unrecoginzed @dataType = %s', @columnName, @dataType; RAISERROR(@ret_string,16,1); RETURN; END; END; ELSE BEGIN /* legal data types, don't change datatype but capture correct columnLength */ -- VALUES ('nvarchar'...
AlterTableAlterColumnStatement 建構函式 屬性 方法 Accept AcceptChildren AlterTableAlterIndexStatement AlterTableAlterPartitionStatement AlterTableChangeTrackingModificationStatement AlterTableConstraintModificationStatement AlterTableDropTableElement AlterTableDropTableElementStatement AlterTableFileTableName...