sql server if else if statement

MS SQL Server Query optimization methodThere are many reasons for the slow speed of queries, which are common1, no indexes, or no indexes (this is the most common problem with query slowness, is the flaw in programming)2, I/o throughput is small,

1. IF ELSEcannot be used in select, only blocks, such as:IF ...BEGIN...ENDelse (note that there is no else if, to be implemented can only be judged in the following block)BEGIN...ENDReference: Https://msdn.microsoft.com/en-us/library/ms182587.aspx2.

emule resources can also be downloaded with thunder The following is a list of files that are shared by users, and you can download them by clicking on them after you install emule [0 Basic science sql.server.2005

The following statements in the complete SQL operation are Mssql statements and cannot be used in access. The following statements in the complete SQL operation are Mssql statements and cannot be used in access. SQL classification: DDL-Data

SQL classification:DDL-Data Definition Language (CREATE, ALTER, DROP, DECLARE)DML-data manipulation language (SELECT, DELETE, UPDATE, INSERT)DCL-Data Control Language (GRANT, REVOKE, COMMIT, ROLLBACK)First, we will briefly introduce the basic

1 --declaring Variables2 Declare @age int3 Declare @name varchar( -)4 5 6 --Assignment (constant value)7 Set @age= -8 Select @name='Zhang San'9 Ten One --isolated from database and assigned value A Set @name=(SelectStudentname

From http://download.microsoft.com/download/e/5/3/e53a74e2-9f13-4736-b263-df72af00a8f0/ReadmeSQLEXP2005Advanced.htm#_3462_setup_issues_238p 3.0 Installation Problems This section describes how to install SP1. SQL Server 2005 express edition

https://blogs.msdn.microsoft.com/apgcdsd/2011/01/10/sql-1/First, IntroductionA problem that is highlighted in front of many developers or database administrators is the performance of the database system. The performance of the system is not ideal

SQL statement Import and Export /****** Export to excelExec master.. xp_mongoshell 'bcp settledb. DBO. shanghu out C:/temp1.xls-C-Q-s "gnetdata/gnetdata"-U "sa"-P ""' /*********** Import ExcelSelect *From OpenDataSource ('Microsoft. Jet. oledb.4.0 ',

Importing data from an Excel file to a SQL database is simple. Importing data from an Excel file to a SQL database is simple. -- Importing data from an Excel file to a SQL database is simple. Use the following statement: /* =========================