Sql 创建函数（截取字符串）

create function dbo.splitFuhao(@CID nvarchar(2000), @delimiter nchar)
returns varchar(60)
as
begin
declare @idx as int
declare @count as int
declare @tempCID as varchar(50)
declare @tempt as varchar(50)
declare @t as varchar(50)
set @count = 1
set @t = ''
while len(@CID) > 0
begin
    set @idx = charindex(@delimiter, @CID)
    if @idx = 0 and len(@CID) > 0
    begin
--        insert into @t values(@CID)
        break
    end
    if @idx > 1
    begin
		if(left(@CID, @idx - 1)='true')
		begin
			 if(@count>1)
			begin 
			set @t = @t+','
			end
		set @t = @t+convert(varchar(10),@count)
		end 
        
        set @CID = right(@CID, len(@CID) - @idx)
    end else
        set @CID = right(@CID, len(@CID) - @idx)

set @count=@count+1
end
return @t
end
go

print dbo.splitFuhao('true-true-false-true-false-true-false', '-')

 返回1,2,4,6