如何在SQL Server存储过程中使用逗号分隔(拆分)字符串

Question

我有一个checkboxlist.选定(已选中)的项目存储在List<string> selected.

例如,选择的值monday,tuesday,thursday超过7天

我转换List<>为逗号分隔string,即

string a= "monday,tuesday,thursday"

现在,我将此值作为字符串传递给存储过程.我想解雇像:

Select * 
from tblx 
where days = 'Monday' or days = 'Tuesday' or days = 'Thursday'`

我的问题是:如何在存储过程中分离字符串？

Answer 1

如果您将逗号分隔(任何分隔符)字符串传递给存储过程并在查询中使用,那么必须吐出该字符串然后您将使用它.

下面有例子:

DECLARE @str VARCHAR(500) = 'monday,tuesday,thursday'
CREATE TABLE #Temp (tDay VARCHAR(100))
WHILE LEN(@str) > 0
BEGIN
    DECLARE @TDay VARCHAR(100)
    IF CHARINDEX(',',@str) > 0
        SET  @TDay = SUBSTRING(@str,0,CHARINDEX(',',@str))
    ELSE
        BEGIN
        SET  @TDay = @str
        SET @str = ''
        END
  INSERT INTO  #Temp VALUES (@TDay)
 SET @str = REPLACE(@str,@TDay + ',' , '')
 END

 SELECT * 
 FROM tblx 
 WHERE days IN (SELECT tDay FROM #Temp)