sql declare cursor

Oracle performance optimization cursor and SQL, these SQL statements are strictly unable to share the cursor (that is, share the execution plan), but the execution plans required for these statements are Oracle performance optimization cursor and

DECLARE @ OldId varchar (50) DECLARE @ CustomerID varchar (50) DECLARE My_Cursor CURSOR -- Define the cursor for (select CustomerID, oldid from Customer where Area = 'bj ') -- locate the desired set and put it in the cursor OPEN M

SQL Cursor example filters data from another table based on data from one tableDECLARE @MID nvarchar (20)DECLARE @UTime datetimeDECLARE @TBL_Temp Table(MID nvarchar (20),Uptime datetime,Chat nvarchar (20))--get UserDECLARE my_cursor Cursor--Defining cursorsFor (SELECT distinct MID, Uptime from Tlinktest)OPEN My_cursorF

-- Start transaction Begin tran -- Do Not Display count Information Set nocount on Declare @ userid varchar (512) Declare @ A int Set @ A = 10000 -- Declare a cursor Declare crmpscontact_cursor cursor Select [userid] from [gmcc

Copy Code code as follows: Create Trigger Tri_wk_csvhead_history on Wk_csvhead_history --Declares a tri_wk_csvhead_history trigger, The instead of INSERT---insert operation is substituted for the following action As Begin DECLARE YB cursor--Declares a cursor For Select Noteno from inserted--the Noteno here to match the following Open YB

SQL often uses loops, and here's a look at common loops and cursor loops1, first need a test table data student2. Normal circulation1) Cycle 5 times to modify student table information--Looping through modification records--DECLARE @i intSet @i=0While @iBeginUpdate Student Set demo = @i+5 where [email protected]Set @[email protected] +1End--View Results--SELECT *

Method Open Method Recordset. Open Source, ActiveConnection, CursorType, LockType, Options Source The Recordset object can be connected to the Command object through the Source attribute. The Source parameter can be a Command object name, an SQL Command, a specified data table name, or a Stored Procedure. If this parameter is omitted, the system uses the Source attribute of the Recordset object. 　　 ActiveConnection The Recordset object can be connect

Code highlighting produced byActipro codehighlighter (freeware) http://Www.CodeHighlighter.com/--> 1 table1 structure as followsIdintnamevarchar( -)Declare @id intDeclare @name varchar( -)DeclareCursor1cursor for --Defining Cursors Cursor1Select * fromTable1--objects using cursors (fill in select text as required)OpenCursor1--Open CursorFetch Next fromCursor1 into @id,@name --move the cursor dow

purchase, that is, to obtain a view, as shown below: Serial number Name Item Summary 1 Zhang San Print paper, computer 2 Li Si Clothes, mobile phones Because you want to get a view, you cannot display it in the storage process. You only need to use functions. Of course, you can also query the purchased items one by one on the client based on the query results, however, multiple round-trips to the C/S end will affect the speed of creating a vie

Recently I have seen a headache with cursor problems. Refresh the cursor. 1 declare @ id varchar (50 );2 declare @ Title varchar (50 );3 declare @ Director varchar (50 );4 declare @ DateReleased varchar (50 );56

Copy codeThe Code is as follows: Create trigger tri_wk_CSVHead_History on wk_CSVHead_History -- Declare a tri_wk_CSVHead_History trigger, Instead of insert --- the insert operation is replaced by the following Operation As Begin Declare YB cursor -- declare a cursor Fo

Declare flag cursor scroll dynamic/* scroll indicates that the cursor pointer can be moved freely (otherwise, the cursor can only be moved forward), and dynamic indicates that the cursor can be read and written (otherwise, the cursor