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 by defining a primary key and creating unique constraints. The primary key will ...
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...
True if the 80 syntax was translated into 90 If this is false and there are index options present, then this statement must be a TSql90 statement However, 80 syntax is still being accepted in SQL 2005...
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...
For example, add aBMIvariable topatients. Calculate body mass index, or BMI, using the values inpatients.Weightandpatients.Height. Assign the BMI values to a new table variable. patients.BMI = (patients.Weight*0.453592)./(patients.Height*0.0254).^2 ...
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
For example, heatmap(tbl,'HealthStatus','Gender') selects the variable named 'HealthStatus' for the x-axis. Numeric scalar indicating the table variable index. For example, heatmap(tbl,2,3) selects the second variable in the table for the x-axis. Logical vector containing one true ...
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...
the createindex() method takes the following parameters: parameter type description keys document a document that contains the field and value pairs where the field is the index key and the value describes the type of index for that field. for an ascending index on a field, specify a value ...