drop可用于删除数据库(drop database 数据库名称)、删除数据表( use 数据库名称 drop table 数据表1名称,数据表2名)或删除数据表字段(use 数据库名称 alter table 数据表名称 drop column 字段名(列名称))。 值得注意的是:drop语句将删除表的结构、被依赖的约束(constrain),
syntaxsql Copy sp_repldropcolumn [ @source_object = ] N'source_object' , [ @column = ] N'column' [ , [ @from_agent = ] from_agent ] [ , [ @schema_change_script = ] N'schema_change_script' ] [ , [ @force_invalidate_snapshot = ] force_invalidate_snapshot ] ...
SparseColumnOption SpatialIndexingSchemeType SpatialIndexOption SpatialIndexRegularOption Sql100ScriptGenerator Sql110ScriptGenerator Sql120ScriptGenerator Sql130ScriptGenerator Sql140ScriptGenerator Sql150ScriptGenerator Sql160ScriptGenerator Sql80ScriptGenerator Sql90ScriptGenerator SqlCommandIdentifier SqlDataTypeOp...
Transact-SQL 语法约定 语法 syntaxsql 复制 DROP COLUMN MASTER KEY key_name; 参数 key_name 列主密钥名称。 注解 只有在没有任何使用列主密钥加密的列加密密钥值的情况下,才能删除列主密钥。 若要删除列加密密钥值,请使用 DROP COLUMN ENCRYPTION KEY 语句。 权限 需要对数据库具有 ALTER ANY COLUMN MASTER...
在SQL Server 的各版本中均不提供联机索引操作。 有关 SQL Server 各个版次支持的功能列表,请参阅SQL Server 2022 的各个版次及其支持的功能。 MOVE TO {partition_scheme_name(column_name) |filegroup_name|“default” } 适用于:SQL Server 2008 (10.0.x) 及更高版本。 SQL 数据库支持"default"作为文件组...
MOVE TO {partition_scheme_name(column_name) |filegroup_name| "default" } Applies to: SQL Server 2008 (10.0.x) and later versions. SQL Database supports"default"as the filegroup name. Specifies a location to move the data rows that currently are in the leaf level of the clustered index....
If you delete all rows in a table by using theDELETEstatement or use theTRUNCATE TABLEstatement, the table definition exists until it's dropped usingDROP TABLE. If you drop a table that contains avarbinary(max)column with theFILESTREAMattribute, any data stored in the file system isn't remov...
To drop a rule, first unbind it if the rule is currently bound to a column or to an alias data type. To unbind the rule, use sp_unbindrule. If the rule is bound when you try to drop it, an error message is displayed and the DROP RULE statement is canceled. After a rule is dr...
The sequence of actions that is described in the "Symptoms" section leaves the first IAM page of the allocation unit for the dropped binary large object column in an orphaned state. This condition generates the 2576 error message. Resolution ...
In the Add Relationship dialog box, click the name of each related field in the respective column, and then click OK. Click Finish. To add additional child tables, repeat these steps. Click Next. To store the results of the query ...