set sql_mode=''; create index idx1 on t1(b); explain format=json select t1.a from t1 group by t1.b order by 1; | { "query_block": { "select_id": 1, "cost_info": { "query_cost": "1.40" }, "ordering_operation": { "using_temporary_table": true, "using_filesort": true...
Only a constant value, such as a character string; a system function, such as a SYSTEM_USER(); or NULL can be used as a default. To maintain compatibility with earlier versions of SQL Server, a constraint name can be assigned to a DEFAULT....
(If a DECLARE GLOBAL TEMPORARY statement is specified within a compound statement of an SQL function, SQL procedure, or trigger; the scope of the declared temporary table is the application process and not the compound statement.) If T was declared at a remote server, the reference to T ...
此语句可以嵌入在应用程序中,也可通过动态 SQL 语句来发出。 它是可动态准备的可执行语句。 授权 语句授权标识所拥有的特权必须至少包括下列其中一项权限: USER TEMPORARY 表空间的 USE 特权 DBADM 权限 SYSADM 权限 SYSCTRL 权限 使用LIKE 或全查询定义表时,该语句的授权标识所拥有的特权还必须至少包括对每个标识...
Is the name of the Transact-SQL server cursor defined. cursor_name must conform to the rules for identifiers. For more information about rules for identifiers, seeUsing Identifiers As Object Names. INSENSITIVE Defines a cursor that makes a temporary copy of the data to be used by the cursor....
Only a constant value, such as a character string; a system function, such as a SYSTEM_USER(); or NULL can be used as a default. To maintain compatibility with earlier versions of SQL Server, a constraint name can be assigned to a DEFAULT....
definitions are removed when the table is dropped. Only a constant value, such as a character string; a system function, such as a SYSTEM_USER(); or NULL can be used as a default. To maintain compatibility with earlier versions of SQL Server, a constraint name can be assigned to a ...
Only a constant value, such as a character string; a system function, such as a SYSTEM_USER(); or NULL can be used as a default. To maintain compatibility with earlier versions of SQL Server, a constraint name can be assigned to a DEFAULT....
Only a constant value, such as a character string; a system function, such as a SYSTEM_USER(); or NULL can be used as a default. To maintain compatibility with earlier versions of SQL Server, a constraint name can be assigned to a DEFAULT....
The name of the Transact-SQL server cursor defined.cursor_namemust conform to the rules for identifiers. INSENSITIVE Defines a cursor that makes a temporary copy of the data to be used by the cursor. All requests to the cursor are answered from this temporary table intempdb. Therefore, base...