摘要:
例1:SELECT 1 order2 FROM dualunion all SELECT 3 order2 FROM dual union all SELECT 2 order1 FROM dual order by 1 order by 是针对整个集合的排队,o... 阅读全文
摘要:
COL_2 COL_321 3123 31如上表数据前台显示显示需要把COL_2的21和23转换成中文 ‘整机’ 最开始如下编写SELECT t.col_3, CASE t.col_2 WHEN 21 THEN‘整机’ WHEN 23 THEN... 阅读全文