The ALTER TABLE command allows you to add, modify, or drop a column from an existing table. Adding column(s) to a table Syntax #1 To add a column to an existing table, the ALTER TABLE syntax is: ALTER TABLE table_name ADD column_name column-definition; For example: ALTER TABLE supplie...
ALTER TABLE TableName1 ADD | ALTER [COLUMN] FieldName1 FieldType [( nFieldWidth [, nPrecision])] [NULL | NOT NULL] [CHECK lExpression1 [ERROR cMessageText1]] [AUTOINC [NEXTVALUE NextValue [STEP StepValue]]] [DEFAULT eExpression1] [PRIMARY KEY | UNIQUE [COLLATE cCollateSequence]] [...
For more information, see CREATE TABLE (Transact-SQL). Note If NULL or NOT NULL is specified with ALTER COLUMN, new_data_type [(precision [, scale ])] must also be specified. If the data type, precision, and scale are not changed, specify the current column values. [ {ADD | DROP}...
Assembly: Microsoft.SqlServer.TransactSql.ScriptDom.dll Package: Microsoft.SqlServer.TransactSql.ScriptDom v161.8901.0 The options for alter column version of alter table statement. AddRowguidcol, DropRowguidcol can only happen if there is no DataType. C# Kopiatu public enum AlterTableAlterColum...
ALTER XML SCHEMA COLLECTION (Transact-SQL) Save Add to Collections Add to Plan Share via Facebookx.comLinkedInEmail Print Article 10/04/2012 In this article Syntax Arguments Remarks Permissions Show 2 more Modifies a table definition by altering, adding, or dropping columns and constraints, reassi...
Assembly: Microsoft.SqlServer.TransactSql.ScriptDom.dll Package: Microsoft.SqlServer.TransactSql.ScriptDom v161.8901.0 The options for alter column version of alter table statement. AddRowguidcol, DropRowguidcol can only happen if there is no DataType. C# 複製 public enum AlterTableAlterColu...
syntaxsql Copy -- Syntax for Warehouse in Microsoft Fabric ALTER TABLE { database_name.schema_name.source_table_name | schema_name.source_table_name | source_table_name } { ADD { <column_constraint> FOR column_name} [ ,...n ] | DROP { [CONSTRAINT] constraint_name } [ ,...n ]...
执行 ALTER DATABASE [database] SET QUERY_STORE = OFF 返回警告 'QUERY_STORE=OFF' is not supported in this version of SQL Server.。 CLEAR [ ALL ] 从查询存储中删除与查询相关的数据。 ALL 是可选项。 ALL 将从查询存储中删除与查询相关的数据和元数据。 OPERATION_MODE { READ_ONLY |...
In earlier versions of SQL Server, AUTO_CLOSE is a synchronous process that can degrade performance when the database is accessed by an application that repeatedly makes and breaks connections to the Database Engine. Starting in SQL Server 2005, the AUTO_CLOSE process is asynchronous; repeatedly ...
Serverless SQL pool in Azure Synapse Analytics supports only external and temporary tables. Syntax for Warehouse in Fabric syntaxsql Copy -- Syntax for Warehouse om Microsoft Fabric: ALTER TABLE { database_name.schema_name.table_name | schema_name.table_name | table_name } { ADD { column_...