CLUSTERED: Clustered index. Nonclustered index: nonclustered.
Clustered is the physical implementation of data ordering, and the same table can only have one clustered index, and nonclustered is the logical sort.
Microsoft's SQL Server supports two types of indexes: Clustered index and nonclustered index.
The clustered index stores data in a data table in a ph
The two tables used by the trigger are shown below
--Create SC table CREATETABLE[SC] ([Scid]intnotnull,[sno]intnotnull,[cno]intnotnull,[score]intdefaultnull,primarykey ([ScId ])
);
--Add Resume Createtablescore_record (
Sridintnotnull,
Snointnotnull,
Cnointnotnull,
Oldscoreintnotnull,
Newscoreintnotnull,
Updatetimedatetimenotnull,primarykey (SrId),
);
The following is a MySQL-written trigger
--mysql write triggers-create triggers, insert t
A few days ago, I used my Kodak digital camera z7590 to take a large (> 300 m) Video (mov format ),
Not easyGet it from the camera to the computer (for some reason, when transferring large files from a digital camera, it always reports errors with insufficient system resources! I used FTP later .). When I want to rename the mov file to VCD, I find that "Sharing conflicts, the source file or target file may be in use" is always reported ". Fainted!
C
The following shows the two tables used by the trigger.
-- Create a SC table CREATETABLE [SC] ([ScId] intNOTNULL, [SNo] intNOTNULL, [CNo] intNOTNULL, [Score] intDEFAULTNULL, PRIMARYKEY ([ScId])
);
-- Add a resume table CREATETABLEscore_record (
SrIdintNOTNULL,
SNointNOTNULL,
CNointNOTNULL,
OldScoreintNOTNULL,
NewScoreintNOTNULL,
UpdateTimedatetimeNOTNULL, PRIMARYKEY (SrId ),
);
The following shows the Mysql write trigger.
-- Mysql write trigger -- create a trigger to insert the score
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