mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-12-05 14:02:21 +00:00
41 lines
792 B
MySQL
41 lines
792 B
MySQL
|
SELECT transform(0, [0, 1], ['ZERO', 'ONE'], 'DEFAULT') AS result;
|
||
|
SELECT transform(0, [0, 1], ['ZERO', 'ONE'], NULL) AS result;
|
||
|
|
||
|
SELECT CASE 1
|
||
|
WHEN 0 THEN 'ZERO'
|
||
|
WHEN 1 THEN 'ONE'
|
||
|
ELSE 'NONE'
|
||
|
END AS result;
|
||
|
|
||
|
SELECT CASE 1
|
||
|
WHEN 0 THEN NULL
|
||
|
WHEN 1 THEN 'ONE'
|
||
|
ELSE 'NONE'
|
||
|
END AS result;
|
||
|
|
||
|
select
|
||
|
case 1
|
||
|
when 1 then 'a'
|
||
|
else 'b'
|
||
|
end value;
|
||
|
|
||
|
select
|
||
|
case 1
|
||
|
when 1 then 'a'
|
||
|
end value;
|
||
|
|
||
|
SELECT
|
||
|
d,
|
||
|
toInt16OrNull(d),
|
||
|
caseWithExpression(d, 'a', 3, toInt16OrZero(d)) AS case_zero,
|
||
|
caseWithExpression(d, 'a', 3, toInt16OrNull(d)) AS case_null,
|
||
|
if(d = 'a', 3, toInt16OrZero(d)) AS if_zero,
|
||
|
if(d = 'a', 3, toInt16OrNull(d)) AS if_null
|
||
|
FROM
|
||
|
(
|
||
|
SELECT arrayJoin(['', '1', 'a']) AS d
|
||
|
)
|
||
|
ORDER BY
|
||
|
case_zero ASC,
|
||
|
d ASC;
|