搜索两个字符串之间的公共前缀

Question

我有一个存储过程：

ALTER PROCEDURE [dbo].[traxs_Paybook_Data_Validate]

    @session_id varchar(30)
    @paybook_start_number varchar(30)
    @paybook_end_number varchar(30)

AS

    UPDATE traxs_temp..__PaybookImport SET
        /* BEGIN CHANGE */
        prefix = null,
        start_number = CAST(@paybook_start_number AS int),
        end_number = CAST(@paybook_end_number AS int)
        /* END CHANGE */
    WHERE   
        session_id = @session_id

值如下：

@paybook_start_number = 100

@paybook_end_number = 200

现在工资簿号码可以有前缀，即：

@paybook_start_number = ABC100

@paybook_end_number = ABC200

前缀并不总是相同的，其长度也不相同。如果有，我需要找到前缀，将其存储到 prefix 中，并在投射之前将其从工资簿号码中删除。

谢谢

Answer 1

您需要一个从输入字符串中提取 Number/Numeric 值的函数和一个从输入字符串中提取字母的函数。

提取数字的函数

CREATE FUNCTION dbo.fn_Extract_Numbers
(
  @string NVARCHAR(100)
)
RETURNS INT 
AS
BEGIN 
    DECLARE @int_Value INT;


SELECT @int_Value = LEFT(subsrt, PATINDEX('%[^0-9]%', subsrt + 't') - 1) 
FROM (
    SELECT subsrt = SUBSTRING(@string, pos, LEN(@string))
    FROM (
           SELECT @string AS string , PATINDEX('%[0-9]%', @string) AS Pos
         ) d
     ) t

  RETURN @int_Value;
END

提取字母的函数

CREATE FUNCTION dbo.fn_Extract_Alphabets
(
  @string NVARCHAR(100)
)
RETURNS NVARCHAR(100) 
AS
BEGIN 
    DECLARE @Alpha_Value NVARCHAR(100);


SELECT @Alpha_Value = LEFT(subsrt, PATINDEX('%[^a-z]%', subsrt + 't') - 1) 
FROM (
    SELECT subsrt = SUBSTRING(@string, pos, LEN(@string))
    FROM (
           SELECT @string AS string , PATINDEX('%[a-z]%', @string) AS Pos
         ) d
     ) t

  RETURN @Alpha_Value;
END

现在在存储过程中使用这些函数来提取 Alphabet/Prefix 位和数字位并将它们存储在目标列中。

有点像....

ALTER PROCEDURE [dbo].[traxs_Paybook_Data_Validate]

    @session_id varchar(30)
    @paybook_start_number varchar(30)
    @paybook_end_number varchar(30)

AS
  DECLARE @Start_Num_Prefix VARCHAR(100);
  DECLARE @End_Num_Prefix   VARCHAR(100);
  DECLARE @Start_Num_Numbers INT;
  DECLARE @End_Num_Numbers   INT;

SELECT  @Start_Num_Prefix   = dbo.fn_Extract_Alphabets(@paybook_start_number)
SELECT  @End_Num_Prefix     = dbo.fn_Extract_Alphabets(@paybook_end_number)
SELECT  @Start_Num_Numbers  = dbo.fn_Extract_Numbers(@paybook_start_number)
SELECT  @End_Num_Numbers    = dbo.fn_Extract_Numbers(@paybook_end_number)


..... rest of your procedure and so on....

Answer 2

试试这个：

DECLARE @z VARCHAR(32) = 'ukasd10';
SELECT LEFT(@z, PATINDEX('%[0-9]%', @z) - 1) AS Prefix,REPLACE(SUBSTRING(@z, PATINDEX('%[0-9]%', @z), LEN(@z)), ',', '') AS Digits

并同样使用此逻辑更新列前缀.... 谢谢

搜索两个字符串之间的公共前缀

Search for a common prefix between two strings

sql-server

string

compare