altertable

  • 网络更改数据表;语句示例;表结构的修改

altertablealtertable

altertable

更改数据表

...1建立数据表(createtable) 4.2.2更改数据表(altertable) 4.2.3删除数据表(drop) 4.3数据操纵语言(dml) 4.3.1插入数据命令(ins…

语句示例

Microsoft SQL Server... ... 10、4、1IDENTITY 列数据的操作技术 10、5、4ALTERTABLE 语句示例 11、2、3INSERT 语句语 …

表结构的修改

...1.1表的定义(CREATETABLE)4.1.2表结构的修改ALTERTABLE)4.1.3表的删除(DROPTABLE)4.2SQL的数据修改功 …

表中增加或删除列的操作

修改表,即在表中增加或删除列的操作Altertable):比如,ALTERTABLEPhone2ADDCOLUMN备注TEXT ALTERTABLEPho…

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In addition, the CREATE TABLE and ALTER TABLE statements can be used to set locking granularity on PRIMARY KEY and UNIQUE constraints. 另外,CREATETABLE和ALTERTABLE语句还可用于设置PRIMARYKEY和UNIQUE约束的锁定粒度。
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Note, however, that the ALTER TABLE statement only allows you to increase the inline length. 但是要注意,ALTERTABLE语句只允许增加inlinelength。
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Specifies the properties of a computed column that are added to a table by using ALTER TABLE. 指定通过使用ALTERTABLE添加到表中的计算列的属性。
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Use the LOCKSIZE parameter of the ALTER TABLE statement to control how locking is done for a specific table on a permanent basis. 使用altERTABLE语句的LOCKSIZE参数控制如何在持久基础上对某个特定表进行锁定。
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For more information about the modifications that can be made to a table, see ALTER TABLE (Transact-SQL). 有关修改表的详细信息,请参阅ALTERTABLE(Transact-SQL)。
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These ALTER TABLE statements should be executed with the same care as any INSERT, UPDATE, or DELETE statement that affects many rows. 如同影响许多行的INSERT、UPDATE或者DELETE语句一样,应谨慎执行这些ALTERTABLE语句。
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DML triggers defined on tables can be also be disabled or enabled by using ALTER TABLE. 还可以通过使用ALTERTABLE来禁用或启用为表所定义的DML触发器。
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For more information, see CREATE TABLE statement, ALTER TABLE statement, DECLARE LOCAL TEMPORARY TABLE statement, and LOAD TABLE statement. 有关详细信息,请参见CREATETABLE语句、ALTERTABLE语句、DECLARELOCALTEMPORARYTABLE语句和LOADTABLE语句。
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You can use the SYSTEM_USER function with DEFAULT constraints in the CREATE TABLE and ALTER TABLE statements. 您可以在CREATETABLE和ALTERTABLE语句中将SYSTEM_USER函数与DEFAULT约束一起使用。
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SQL described tables and indexes can also be placed and moved by the corresponding ALTER TABLE or ALTER INDEX commands. SQL描述的表和索引也可以通过对应的ALTERTABLE或ALTERINDEX命令放置和移动。
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ALTER TABLE can be below as identical as original list catalog catalog found express temporarily. ALTERTABLE会在与原始表目录相同的目录下创建临时表。
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ALTER TABLE permissions apply to both tables involved in an ALTER TABLE SWITCH statement. ALTERTABLE权限适用于ALTERTABLESWITCH语句涉及的两个表。
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In an ALTER TABLE. . . SWITCH operation, the lock is acquired on both the source and target tables. ALTERTABLE…SWITCH操作中,源表和目标表都需要锁。
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Columns that do not allow null values can be added with ALTER TABLE only if they have a default specified or if the table is empty. 如果列不允许空值,则只有在指定了默认值或表为空的情况下,才能用ALTERTABLE语句添加该列。
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When an ALTER TABLE statement is run, the messages that are created by these three event notifications are merged into one. 运行ALTERTABLE语句时,这三个事件通知创建的消息将合并为一条消息。
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Grant ALTER TABLE permission to the user on all tables that are affected by the bcp process. 将受bcp进程影响的所有表的ALTERTABLE权限授予用户。
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Generates ALTER TABLE statements when scripting constraints. 在编写约束脚本时生成ALTERTABLE语句。
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We recommend that you create default definitions by using the DEFAULT keyword in the ALTER TABLE or CREATE TABLE statements instead. 建议您改为在ALTERTABLE或CREATETABLE语句中使用DEFAULT关键字来创建默认定义。
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A partition switch involves execution of an ALTER TABLE statement. 分区切换涉及ALTERTABLE语句的执行。
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You can specify collations for each character string column using the COLLATE clause of the CREATE TABLE or ALTER TABLE statement. 可以使用CREATETABLE或ALTERTABLE语句的COLLATE子句指定每个字符串列的排序规则。
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Grant ALTER TABLE permission to the user on all tables that are affected by the. 进程影响的所有表的ALTERTABLE权限授予用户。
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For more information about the DEFAULT keyword, see ALTER TABLE (Transact-SQL) and CREATE TABLE (Transact-SQL). 有关DEFAULT关键字的详细信息,请参阅ALTERTABLE(Transact-SQL)和CREATETABLE(Transact-SQL)。
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ALTER TABLE can be time-consuming, and the server will not process requests referencing the table while the statement is being processed. ALTERTABLE可能很耗时,当正在处理语句时,服务器不会处理引用表的请求。
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Instead, use default definitions that you can create by using the DEFAULT keyword of ALTER TABLE or CREATE TABLE. 请改用使用ALTERTABLE或CREATETABLE的DEFAULT关键字创建的默认定义。
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The changes specified in ALTER TABLE are implemented immediately. ALTERTABLE语句指定的更改将立即实现。
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NOCHECK CONSTRAINT is used with ALTER TABLE to disable the constraint and allow for an insert that would typically violate the constraint. NOCHECKCONSTRAINT与ALTERTABLE一起使用以禁用该约束,从而允许执行通常会违反约束的插入操作。
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Updated the requirements for ALTER TABLE permission. 更新了对ALTERTABLE权限的要求。
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In the previous example, trigger safety fires after any DROP TABLE or ALTER TABLE event. 在前面的示例中,在发生DROPTABLE事件或ALTERTABLE事件后触发触发器safety。
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If the changes require modifications of the rows in the table, ALTER TABLE updates the rows. 如果这些更改需要修改表中的行,ALTERTABLE将更新这些行。
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Instead, use default definitions created using the DEFAULT keyword of ALTER TABLE or CREATE TABLE. 而应使用通过使用ALTERTABLE或CREATETABLE的DEFAULT关键字所创建的默认值定义。