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选定语句中的动态变量
原标题:Dynamic variable in select statement
  • 时间:2012-05-23 10:46:28
  •  标签:
  • mysql
  • select

我正在试图写入一个使用多个关键字搜索的选定语句。 例如,

SELECT id FROM my_mod mm WHERE (mm.name LIKE  %joe%  OR mm.name LIKE  %jim% );

我想做的是 返回数据有一个额外的列 计数该行的次数 与类似语句的次数。

如果上面有一个名称 < code>jimjoe , 它会计2, 或者如果这个名称是 jim , 它会计1。 有人知道这样做的方法吗?

我还要提到,我无法使用临时表格。

最佳回答

试试这个

select t.id,count(*) FROM
((select id from my_mod where name like  %jim% )
union all
(select id from my_mod where name like  %joe% )) t group by t.

"http://sqlfiddle.com/#!2/a654d7/3" rel="no follow" >我在这里检查它是如何工作的

问题回答
SELECT id, 
       CASE 
         WHEN mm.name LIKE  %joe%  
              AND mm.name LIKE  %jim%  THEN 2 
         ELSE 1 
       end AS cnt 
FROM   my_mod mm 
WHERE  mm.name LIKE  %joe%  
        OR mm.name LIKE  %jim%  

尝试此查询 -

SELECT
  COUNT(IF(name LIKE  %joe% , 1, NULL)) joe_count,
  COUNT(IF(name LIKE  %jim% , 1, NULL)) jim_count
FROM
  my_mod
WHERE
  name LIKE  %joe%  OR name LIKE  %jim% 




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