« 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 represent a clustered index, while the unique ...
table_name | table_name } ( { <column_definition> | [ <table_constraint> ] [ ,... n ] | [ <table_index> ] [ ,... n ] } [ PERIOD FOR SYSTEM_TIME ( system_start_time_column_name , system_end_time_column_name ) ] ) [ WITH ( <table_option> [ ,... n ] ) ] [ ;...
varchar[ (n|max) ] Variable-length, non-Unicode character data with a length ofnbytes.nmust be a value from1to8000.maxindicates that the maximum storage size is 2^31-1 bytes (2 GB). The storage size is the actual length of data entered + 2 bytes. Themaxlength applies only to Azure...
180 181 最大记录的字节长度可以按下面的计算得出: 182 row length = 1 183 + (sum of column lengths) 184 + (number of NULL columns + 7)/8 185 + (number of variable-length columns) 186 187 table_options 和 SELECT 选项只在 MySQL 3.23 和以后的版本中被实现。 不同的表类型为: 188 189 ...
Microsoft Access 数据库引擎不支持将 CREATE TABLE 或任何 DDL 语句与非 Microsoft Access 数据库引擎数据库结合使用。 请改用 DAOCreate方法。 语法 CREATE [TEMPORARY] TABLE table(field1 类型[ (size) ] [NOT NULL] [WITH COMPRESSION |WITH COMP] [index1] [,field2type[ (size) ] [NOT NULL] [inde...
The innodb_file_per_table variable must be enabled to use the DATA DIRECTORY clause. The full directory path must be specified. For more information, see Section 14.6.1.2, “Creating Tables Externally”. When creating MyISAM tables, you can use the DATA DIRECTORY='directory' clause, the ...
CREATE TABLE (Transact-SQL) IDENTITY-Eigenschaft (Transact-SQL) CREATE TRIGGER (Transact-SQL) CREATE TYPE (Transact-SQL) CREATE USER (Transact-SQL) CREATE VIEW (Transact-SQL) CREATE WORKLOAD GROUP (Transact-SQL) CREATE XML INDEX (Transact-SQL) ...
A numeric scalar indicating the table variable index. For example, heatmap(__,'ColorVariable',1) selects the third variable in the table for the y-axis. A logical vector containing one true element. The values associated with your table variable must be of a numeric type or logical. The...
1 This definition of session variable is specific to this context, as part of non-deterministic-expression. column-constraint: CONSTRAINTconstraint-namePRIMARY KEYUNIQUEreferences-clauseCHECK(check-condition) period-definition: PERIOD FOR SYSTEM_TIME(begin-column-name,end-column-name)BUSINESS_TIME(begi...
CREATE DATA cannot be used to create internal tables with header lines. Example Creates and uses an anonymous hash table. The type of the data reference variable is generic, which means it can only be dereferenced in the case of assignment to a field symbol. ...