1CREATETRIGGERRUN_STATE2ONA3FORINSERT4AS5IF( (SELECTCOUNT(1)FROMinserted)>1)6BEGIN7RAISERROR('一次只能插入一条数据!',16,10);8rollback;9END10ELSE11BEGIN12IF( (SELECTTOP1typeFROMinserted)='runtime')---插入的数据是否为runtime状态信息13BEGIN14IFEXISTS(SELECT1FROMBWHEREtype='runtime')---B...
Insert Query in SQL The SQL INSERT is used in placing new rows of information inside a table to specify actual values for appropriate columns. Update Query in SQL The SQL UPDATE command is used to update existing records in a table. It changes the values of specified columns based on a...
String predicate pushdown leverages the primary/secondary dictionary created for columns to improve the query performance. 例如,請考慮數據列群組內包含100個相異字串值的字串資料行區段。 假設有一百萬個資料列,每個相異字串值平均被參考 10,000 次。 使用字串述詞下推功能,查詢操作會根據...
AVG ->Operand data type varchar is invalid for avg operator avoid insertion of duplicate entries in a BULK INSERT statement Bad performance of EXCEPT operator Basic - select with fixed values - invert columns to rows Basic CTE query, get full path of something recursive BCP Error - Copy direct...
My plan was to use peer-to-peer (P2P) SQL Server 2005 transaction replication combined with Microsoft® Cluster Server (MSCS), where I would have a cluster IP that’s sourced to one of the two nodes, so all insert, update, delete, and read traffic goes to a single node in the ...
Sets Transact-SQL and query processing behaviors to be compatible with the specified version of the Database Engine.
2.2.3.2Requirements for Creating the Destination Oracle Objects The user associated with the Oracle database connection used to perform the migration (that is, to run the script containing the generated DDL statements) must have the following roles and privileges: ...
For this tutorial, everything is left at default. However, any changes made in the window also reflect in the script. Select Script > Script Action to New Query Window: Review the T-SQL populated in the query window. Select Execute to execute the query to back up the database via T-...
SUSPEND_FOR_SNAPSHOT_BACKUP ON [;] BACKUP SERVER TO <backup_device> [ ,...n ] [ <MIRROR TO clause> ] [ next-mirror-to ] [ WITH { METADATA_ONLY | <general_WITH_options> [ ,...n ] } ] [;] --Back up a group of databases ALTER DATABASE <database> SET SUSPEND_FOR_SNAP...
In an Integration Services package, whether a result set is returned to the Execute SQL task depends on the type of SQL command that the task uses. For example, a SELECT statement typically returns a result set, but an INSERT statement does not. ...