I have never been ignorant.
A friend asked me about the following.CodeWhy not:
Declare
@ Rowcount
Int ;
Set
@ Rowcount
=
10 ;
Select
Top
@ Rowcount
*
From
Table
This is because top only accepts constants as
Because looking at Oracle, I always thought SQL Server was stupid.
It's rumored that SQL 2005 has something rowid to solve the top sort problem. Unfortunately, there is no chance to experience it. When you write a stored procedure in SQL 2000, you
Source: The difference between @ @IDENTITY and @ @ROWCOUNT in SQL Drip 31-sql statementdifference between @ @IDENTITY and @ @ROWCOUNT in SQL statementsAfter an INSERT, SELECT into, or bulk copy statement is complete, the @ @IDENTITY contains the
In SQL Server, the number of affected rows returned is: If @ @RowCount In Oracle, the number of affected rows returned is: If sql%rowcountCases:Sql server:Create procedureproc_test@Stat int=0, @MsgId varchar( -)="', as BEGIN
Talking about the ROWCOUNT function of PDO, talking about Pdorowcount
PDO has a function Pdostatement::rowcount returns the number of rows affected by the previous SQL statement.
The ROWCOUNT function is correct for a delete, INSERT, or UPDATE
SQL % found, SQL % notfound, SQL % rowcountWhen executing the DML (insert, update, delete) statement, you can use the following three implicit cursors (the cursor is an area in the memory that maintains the query results, which is opened when DML is
After a DML statement is executed, the results of the DML statement are stored in four cursor attributes, which are used to control the program flow or understand the program status. When running DML statements, PL
After a DML statement is executed,
Sometimes, if n in Top N is a variable, you need to use:
declare @count1 intset @count1 = 8select top (@count1) * from MyTable
If set rowcount is used, the same effect can be achieved.
declare @count1 intset @count1 = 8 set RowCount @count1
This article mainly introduces the use of the ROWCOUNT function of PDO and the efficiency of the problem, the need for friends can refer to the following
PDO has a function Pdostatement::rowcount returns the number of rows affected by the previous
This article mainly introduces the usage and efficiency of the rowCount function of PDO. For more information, see
This article mainly introduces the usage and efficiency of the rowCount function of PDO. For more information, see
The PDO
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