我在if let user = user {
下方有<{p}}
PFAnonymousUtils.logIn{ (user, error) in
if error == nil {
print("Success")
}
else {
print("Failed")
}
}
我有一个case语句,它将该表中的数据提取到另一个定义的表中。
a
有没有办法在case语句中指定行号,而不是对case语句中的表YEAR_WW
2016-23
2016-24
2016-25
2016-26
2016-27
2016-28
2016-29
2016-30
2016-31
2016-32
2016-33
2016-34
2016-35
进行硬编码?即:
SELECT Family,Value,YEAR_WW
,weekly_qty = CASE WHEN YEAR_WW = '2016-23' THEN week1
WHEN YEAR_WW = '2016-24' THEN week2
WHEN YEAR_WW = '2016-25' THEN week3
WHEN YEAR_WW = '2016-26' THEN week4
WHEN YEAR_WW = '2016-27' THEN week5
WHEN YEAR_WW = '2016-28' THEN week6
WHEN YEAR_WW = '2016-29' THEN week7
WHEN YEAR_WW = '2016-30' THEN week8
WHEN YEAR_WW = '2016-31' THEN week9
WHEN YEAR_WW = '2016-32' THEN week10
WHEN YEAR_WW = '2016-33' THEN week11
WHEN YEAR_WW = '2016-34' THEN week12
ELSE week13 END
FROM sample_table
答案 0 :(得分:1)
如果我已正确理解您的样本表;
我认为你可以使用ROW_NUMBER()
SELECT Family, Value, YEAR_WW
, CONCAT('week', ISNULL(CONVERT(VARCHAR, i),13))
FROM sample_table X
LEFT JOIN (
SELECT ROW_NUMBER() OVER(ORDER BY YEAR_WW) AS i, YEAR_WW
FROM a
) Y
ON X.weekly_qty = Y.YEAR_WW
为了安全起见,您可能希望使用ORDER BY CONVERT(INT, LEFT(YEAR_WW,4)*52)+CONVERT(INT, RIGHT(YEAR_WW,2))
而不只是ORDER BY YEAR_WW