• 不同数据库中查询前几条记录的用法(SQL Server/Oracle/Postgresql)


    SQL在不同数据库中查询前几条记录的用法分类


    1. orACLE
    Select * FROM TABLE1 Where ROWNUM<=N


    2. INFORMIX
    Select FIRST N * FROM TABLE1


    3. DB2
    Select * ROW_NUMBER() OVER(ORDER BY COL1 DESC) AS ROWNUM Where ROWNUM<=N
    或者
    Select COLUMN FROM TABLE FETCH FIRST N ROWS ONLY


    4. SQL SERVER
    Select TOP N * FROM TABLE1


    5. SYBASE
    SET ROWCOUNT N
    GO
    Select * FROM TABLE1


    6. MYSQL
    Select * FROM TABLE1 LIMIT N


    7. FOXPRO
    Select * TOP N FROM TABLE orDER BY COLUMN

    8.postgres查询前几条记录SQL
    Select * FROM TABLE LIMIT  n

    =================================================================================================

    如在ms sqlserver 用此语句:
    select top 2 * from test01 就会只显示前2条记录,

    MYSQL/PostgreSQL
    select * from your_table where .... limit 2;
    //使用limit就可以了.

    Oracle的语句:
    select * from (select rownum r ,* from test) tt
    where tt.r > 50 and tt.r <= 100; (最好用PLSQL游标来解决)

    DB2中:
    select * from payment fetch first 5 row only --查前5条记录 

     

     

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  • 原文地址:https://www.cnblogs.com/davidgu/p/2108207.html
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