在系统中经常会遇到向数据库中批量插入数据情况，存储过程中没有数组，只有通过字符串分割循环插入，下面是一个本人研究的一个例子：
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create proc [dbo].[Proc_TestBatchMainDetailIns]
@mainName nvarchar(50),@detailNameStr nvarchar(max),@detailAgeStr nvarchar(max),
@detailRowCount int=1,@tmpFlag int=1,@newMainId int=0
asbegininsert into TestProBatch_Main(MainName) values(@mainName) select @newMainId=@@IDENTITY
set @detailRowCount=len(@detailNameStr)-len(replace(@detailNameStr,'|',''))+1
set @detailNameStr=@detailNameStr+'|'
set @detailAgeStr=@detailAgeStr+'|'
while(@tmpFlag<=@detailRowCount)begininsert into TestProcBatch_Detail(MainId,DetailName,DetailAge) values(@newMainId,dbo.F_RtnStrBySplitIndex(@detailNameStr,@tmpFlag),dbo.F_RtnStrBySplitIndex(@detailAgeStr,@tmpFlag))
set @tmpFlag=@tmpFlag+1
endend |
这个例子是插入一条主单信息和对应的多条子信息，下面是两张表
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--主表CREATE TABLE [dbo].[TestProBatch_Main](
[ID] [int] IDENTITY(1,1) NOT NULL primary key,
[MainName] [nvarchar](50) NOT NULL,
[CreateTime] [datetime] NOT NULL
)；
--子表CREATE TABLE [dbo].[TestProcBatch_Detail](
[ID] [int] IDENTITY(1,1) NOT NULL primary key,
[MainId] [int] NOT NULL,
[DetailName] [nvarchar](50) NOT NULL,
[DetailAge] [int] NOT NULL,
[CreateTime] [datetime] NOT NULL
)；
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dbo.F_RtnStrBySplitIndex是自定义的标量值函数，用于返回第几个分割符对应的字符串，如dbo.F_RtnStrBySplitIndex('jack|lilei|tom|nike',3) 则返回tom
下面是函数的创建
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create function [dbo].[F_RtnStrBySplitIndex](@procStr nvarchar(max),@splitStrIdx int)
returns nvarchar(250)
asbegindeclare @rtnStr nvarchar(250)
declare @currentSplitIdx int
declare @preSplitIdx int
set @currentSplitIdx=dbo.F_RtnSomeCharIdxInStrByNo('|',@procStr,@splitStrIdx)
set @preSplitIdx=dbo.F_RtnSomeCharIdxInStrByNo('|',@procStr,@splitStrIdx-1)
set @rtnStr=SUBSTRING(@procStr,@preSplitIdx+1,@currentSplitIdx-@preSplitIdx-1)
return @rtnStr
end |
这个函数当中又用到了另一个函数dbo.F_RtnSomeCharIdxInStrByNo，用于返回某个字符在一个字符串的位置，下面是该函数的定义：
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ALTER function [dbo].[F_RtnSomeCharIdxInStrByNo](@findSplitStr varchar(250), @procStr varchar(8000), @n smallint)
returns int
asbegin if @n < 1 return (0)
declare @start smallint, @count smallint, @index smallint, @len smallint
set @index = charindex(@findSplitStr, @procStr)
if @index = 0 return (0)
else select @count = 1, @len = len(@findSplitStr)
while @index > 0 and @count < @n
begin
set @start = @index + @len
select @index = charindex(@findSplitStr, @procStr, @start), @count = @count + 1
end
if @count < @n set @index = 0
return (@index)
end |
调用存储过程：exec Proc_TestBatchMainDetailIns 'mainName1','jack|lilei|tom|nike','20|18|22|17'
下面是成功插入后查询到的结果：