示例:
SELECT
a.Sentence,
b.Klg,
CASE
b.字段1
WHEN '1' THEN
'正确'
else
'错误' end as 别名1,
CASE
b.字段2
WHEN '1' THEN
'可识别'
else
'不可识别' end as 别名2
FROM
table1 a,
table2 b
WHERE
a.SID = b.SID
