mysql中case-when-then和oracle的decode函式
阿新 • • 發佈:2019-02-19
mysql中case-when-then的用法
oracle中decode()函式的用法
<select id="selectConType" resultType="hashmap"> select DISTINCT case when con_type =1 then 'Layout' when con_type =2 then 'Menu and Button' when con_type =3 then 'Form' when con_type =4 then 'DataGrid and Tree' when con_type =5 then 'Window' when con_type =6 then 'Html' when con_type =7 then 'Table' when con_type =8 then 'Other' end as META_TYPE,CON_TYPE from FDES_FORM_CON order by CON_TYPE asc </select>
oracle中decode()函式的用法
<select id="selectConType" resultType="hashmap"> select DISTINCT decode(con_type,1,'Layout',2,'Menu and Button',3,'Form',4,'DataGrid and Tree',5,'Window',6,'Html',7,'table',8,'Other') META_TYPE , CON_TYPE from FDES_FORM_CON order by CON_TYPE asc </select>