Question

这里有些奇怪的东西。我有一个名为FLDOC的数据库。它有一个名为SENTENCE的列，其中包含7个代表时间长度的数字。

这7位数是一个类型的长度，因为数字代表YYYMMDD

所以我喜欢的是一个可以将其转换为这样的脚本：

5Y 00M 00D
75Y 00M 00D
6M (or 000Y 6M 00D is fine as well)
4Y 6M 15D  etc etc

提前感谢...

Answer 1

尝试此查询

select convert(varchar(10),left(example,3))+'Y '+
convert(varchar(10),Substring(example,4,3))+'M '+
convert(varchar(10),Right(example,3))+'D'+ from tablename

Answer 2

您也可以使用Concat执行此操作：

Select  Concat
        (
            Left(SENTENCE, 3), 'Y ', 
            SubString(SENTENCE, 4, 2), 'M ', 
            Right(SENTENCE, 2), 'D'
        )
From    Table

要像在示例中那样压缩表达式，也可以使用它：

Select  Concat
        (
            Case When (IsNumeric(Left(SENTENCE, 3)) = 1 And Left(SENTENCE, 3) <> '000')
            Then Convert(Varchar (3), Convert(Int, Left(SENTENCE, 3))) + 'Y ' End,

            Case When (IsNumeric(SubString(SENTENCE, 4, 2)) = 1 And SubString(SENTENCE, 4, 2) <> '00')
            Then Convert(Varchar (2), Convert(Int, SubString(SENTENCE, 4, 2))) + 'M ' End, 

            Case When (IsNumeric(Right(SENTENCE, 2)) = 1 And Right(SENTENCE, 2) <> '00')
            Then Convert(Varchar (2), Convert(Int, Right(SENTENCE, 2))) + 'D' End
        )
From    Table

Answer 3

CONCAT是SQL Server 2012的新功能。如果您有以前版本的SQL Server，您可以执行类似的操作来实现所需的输出：

SELECT sentence
    ,(
        CASE 
            WHEN cast(left(sentence, 3) AS INT) > 0
                THEN cast(cast(left(sentence, 3) AS INT) AS VARCHAR(3)) + 'Y '
            ELSE cast(left(sentence, 3) AS VARCHAR(3)) + 'Y '
            END + 
        CASE 
            WHEN cast(substring(sentence, 4, 2) AS INT) > 0
                THEN cast(cast(substring(sentence, 4, 2) AS INT) AS VARCHAR(2)) + 'M '
            ELSE cast(substring(sentence, 4, 2) AS VARCHAR(2)) + 'M '
            END + 
         CASE 
            WHEN cast(right(sentence, 2) AS INT) > 0
                THEN cast(cast(right(sentence, 2) AS INT) AS VARCHAR(3)) + 'D'
            ELSE cast(right(sentence, 2) AS VARCHAR(3)) + 'D'
            END
        ) AS new_sentence
FROM FLDOC;

SQL Fiddle Demo

<强>更新

要在评论中回答下面的问题，您可以写一个这样的更新声明：

update FLDOC 
set sentence = (
        CASE 
            WHEN cast(left(sentence, 3) AS INT) > 0
                THEN cast(cast(left(sentence, 3) AS INT) AS VARCHAR(3)) + 'Y '
            ELSE cast(left(sentence, 3) AS VARCHAR(3)) + 'Y '
            END + 
        CASE 
            WHEN cast(substring(sentence, 4, 2) AS INT) > 0
                THEN cast(cast(substring(sentence, 4, 2) AS INT) AS VARCHAR(2)) + 'M '
            ELSE cast(substring(sentence, 4, 2) AS VARCHAR(2)) + 'M '
            END + 
         CASE 
            WHEN cast(right(sentence, 2) AS INT) > 0
                THEN cast(cast(right(sentence, 2) AS INT) AS VARCHAR(3)) + 'D'
            ELSE cast(right(sentence, 2) AS VARCHAR(3)) + 'D'
            END
        )

在列中重新格式化数据

3 个答案: