sql number of rows

PremiseWhen this article discusses only SQL Server queries,For non-composite statistics, where the statistics for each field contain only the data distribution of theHow to estimate the number of rows based on statistical information when combining

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

The source of this article: http://www.cnblogs.com/wy123/p/6008477.htmlFor statistics on the number of rows of data estimates, previously written on the non-related columns (separate or separate index columns) of the algorithm, refer to here.

Essence: Read operation, with mysql_num_rows function, write operation with mysql_affected_rows functionmysql_num_rows () returns the number of rows in the result set. This command is valid only for SELECT statements. To get the number of rows

The source of this article: http://www.cnblogs.com/wy123/p/6008477.htmlFor statistics on the number of rows of data estimates, previously written on the non-related columns (separate or separate index columns) of the algorithm, refer to here.Today,

1 Create TableBuyer as 2 SELECTb.ID asBankID3 fromV_product_deal_main m, Base_member b4 WHEREb.ID=M.buyerid5 andM.dealdateTo_date ('20160630','YYYYMMDD')6 andM.state= 97 andB.state= 0;8 ---4419479 --Seller SquareTenCreate table

One of the power of T-SQL is the large volume of operation data. However, in some scenarios, the number of rows affected by T-SQL needs to be limited. For example, in the past, Yilong encountered a scenario where too many rows were changed at a time

For more information about bugs fixed in SQL Server 2000 Service Pack 4, click the following article number to view the article in the Microsoft Knowledge Base:314128 FIX: When an RPC call is performed, Access with conflicting values includes an

1. @ Error   If an error occurs in the current statement, the error code is returned. Otherwise, 0 is returned. Note that @ error is reset immediately after each statement is executed. Therefore, check the value after the statement to be verified is

Quick Method for counting the number of rows in each table in SQL Server This article mainly introduces how to calculate the number of rows in each table in SQL Server. This article does not use the traditional count () function because it is slow