Specifies any field or combination of fields in the table for creating a candidate index. A table can have multiple candidate indexes. However, if you previously created a primary index with one of thePRIMARY KEYoptions, you cannot include the field that was specified for the primary index. ...
CREATE TABLE - SQL Command Article 11/14/2006 Creates a table using the specified fields or from an array. Copy CREATE TABLE | DBF TableName1 [NAME LongTableName] [FREE] ( FieldName1 FieldType [( nFieldWidth [, nPrecision] )] [NULL | NOT NULL] [CHECK lExpression1 [ERROR cMessageTe...
Creates a table having the specified fields.The Visual FoxPro ODBC Driver supports the native Visual FoxPro language syntax for this command. For driver-specific information, see Driver Remarks.SyntaxCopy CREATE TABLE | DBF TableName1 [NAME LongTableName] [FREE] (FieldName1FieldType [(n...
Gets or sets the Transact-SQL statement, table name or stored procedure to execute at the data source. CommandTimeout Gets or sets the wait time (in seconds) before terminating the attempt to execute a command and generating an error. ...
修改资源调控器配置以使配置有效,并启用资源调控器。 SQL 复制 ALTER RESOURCE GOVERNOR WITH (CLASSIFIER_FUNCTION = dbo.rg_classifier); ALTER RESOURCE GOVERNOR RECONFIGURE; 查询sys.resource_governor_configuration 验证资源调控器是否已启用,并且正在使用我们创建的分类器函数。 SQL 复制 SELECT ...
sections provide parameters to develop command-line installation scripts for install, update, and repair scenarios. Parameterscan take different values depending on the chosen scenario. Parametersthat are listed for a SQL Server Database Engine component are specific to that component. SQL ...
INSERTINTOtable_name(column1,column2,column3, ...) VALUES(value1,value2,value3, ...); 2. If you are adding values for all the columns of the table, you do not need to specify the column names in the SQL query. However, make sure the order of the values is in the same order ...
ERROR 1045 (28000): Access denied for user 'ODBC'@'localhost' (using password: NO) 表示需要输入用户名密码 C:\Users\sunlu>mysql -uroot -pwrongpw mysql: [Warning] Using a password on the command line interface can be insecure. ERROR1045 (28000): Access deniedforuser'root'@'localhost'(usin...
SELECT * INTO #student_backup FROM user_db.student_admin.student As in Oracle, when a table is copied in SQL Server, the referential integrity definitions are not copied to the new table. If you need to copy data into tables using a SELECT statement, consider creating the table first, ...
select count(*) from student 使用SHOW PROFILES语句查看SQL语句信息。SHOW PROFILES 注:显示的条数默认是15条,显示的记录数由变量:profiling_history_size 控制。查询学生条数的Query ID为2000035,查看SQL语句执行过程中所在线程的具体信息:SHOW PROFILE FOR QUERY 2000035 执行SQL语句的时间主要花费在executing上。