Posted on November 23, 2009 by Derek Dieter 14 4 « Create Index on Temp Table Beginning of Month » Creating an index on a table variable can be done implicitly within the declaration of the table variable
CREATE CLUSTERED INDEX IDX_C_Users_UserID ON #Users(UserID)CREATE INDEX IDX_Users_UserName ON #Users(UserName) [/cc]Even though you can implicitly create a clustered index on a table variable (@table) by defining a primary key or unique constraint, it is generally more efficient to use ...
Create a nonclustered index on a table or view SQL Copy CREATE INDEX index1 ON schema1.table1 (column1); Create a clustered index on a table and use a 3-part name for the table SQL Copy CREATE CLUSTERED INDEX index1 ON database1.schema1.table1 (column1); Create a nonclustere...
Learn more about the Microsoft.SqlServer.TransactSql.ScriptDom.CreateIndexStatement.CreateIndexStatement in the Microsoft.SqlServer.TransactSql.ScriptDom namespace.
InnoDB 不允许 index_name 被指定,参考表的列总是必须明确命名。从 4.0.8 开始,InnoDB 在外键上支持 ON DELETE 和ON UPDATE 动作。精确句法查看 InnoDB 手册章节。查看章节 7.5 InnoDB 表。对于其它的表类型,MySQL 服务器对 CREATE TABLE 命令中的 FOREIGN KEY、CHECK 和REFERENCES 句法作语法分析,但是没有更...
_table_name [ ( ref_column [ ,... n ] ) ] [ ON DELETE { NO ACTION | CASCADE | SET NULL | SET DEFAULT } ] [ ON UPDATE { NO ACTION | CASCADE | SET NULL | SET DEFAULT } ] [ NOT FOR REPLICATION ] | CHECK [ NOT FOR REPLICATION ] ( logical_expression ) } <table_index> ...
Up to 16 columns can be combined into a single composite index key. All the columns in a composite index key must be in the same table or view. The maximum allowable size of the combined index values is 900 bytes. For more information about variable type columns in composite indexes, see...
_table_name [ ( ref_column [ ,... n ] ) ] [ ON DELETE { NO ACTION | CASCADE | SET NULL | SET DEFAULT } ] [ ON UPDATE { NO ACTION | CASCADE | SET NULL | SET DEFAULT } ] [ NOT FOR REPLICATION ] | CHECK [ NOT FOR REPLICATION ] ( logical_expression ) } <table_index> ...
Bottom-up Index BuildSince tuples are ordered, we allocate a leaf page and append tuples to it. Once it is full (fill factor is dictated by external configuration variable), we append a node pointer of the page to its parent page and same process is then followed for all the non-leaf...
ITableVariableCreateTableVariable(stringname, ITableDataType dataType) 参数 name 类型:System. . :: . .String The name of the variable to create. dataType 类型:Microsoft.SqlServer.Management.SqlParser.Metadata. . :: . .ITableDataType