各个获取随机列的语法
 
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各个数据库获取随机列的语法  
  
MySQL  
  
    SELECT column FROM table ORDER BY RAND() LIMIT 10  
  
 
  
    SELECT column FROM( SELECT column FROM table ORDER BY dbms_random.value ) WHERE rownum <= 10  
      
PostgreSQL  
  
    SELECT column FROM table ORDER BY RANDOM() LIMIT 10  
      
SQL Server  
  
    SELECT TOP 10 column FROM table ORDER BY NEWID()