sql存储过程中处理json数据

注意:此方法经过验证后,在数据量大于5条以后会很慢,不建议使用。

建议使用这种方法:https://blog.csdn.net/taozi_5188/article/details/105744265

用到的函数:

CREATE FUNCTION [huo].[parseJSON]( @JSON NVARCHAR(MAX))  
  
RETURNS @hierarchy TABLE  
  
  (  
  
   element_id INT IDENTITY(1, 1) NOT NULL, /* internal surrogate primary key gives the order of parsing and the list order */  
  
   sequenceNo [int] NULL, /* the place in the sequence for the element */  
  
   parent_ID INT,/* if the element has a parent then it is in this column. The document is the ultimate parent, so you can get the structure from recursing from the document */  
  
   Object_ID INT,/* each list or object has an object id. This ties all elements to a parent. Lists are treated as objects here */  
  
   NAME NVARCHAR(2000),/* the name of the object */  
  
   StringValue NVARCHAR(MAX) NOT NULL,/*the string representation of the value of the element. */  
  
   ValueType VARCHAR(10) NOT null /* the declared type of the value represented as a string in StringValue*/  
  
  )  
  
AS  
  
BEGIN  
  
  DECLARE  
  
    @FirstObject INT, --the index of the first open bracket found in the JSON string  
  
    @OpenDelimiter INT,--the index of the next open bracket found in the JSON string  
  
    @NextOpenDelimiter INT,--the index of subsequent open bracket found in the JSON string  
  
    @NextCloseDelimiter INT,--the index of subsequent close bracket found in the JSON string  
  
    @Type NVARCHAR(10),--whether it denotes an object or an array  
  
    @NextCloseDelimiterChar CHAR(1),--either a '}' or a ']'  
  
    @Contents NVARCHAR(MAX), --the unparsed contents of the bracketed expression  
  
    @Start INT, --index of the start of the token that you are parsing  
  
    @end INT,--index of the end of the token that you are parsing  
  
    @param INT,--the parameter at the end of the next Object/Array token  
  
    @EndOfName INT,--the index of the start of the parameter at end of Object/Array token  
  
    @token NVARCHAR(200),--either a string or object  
  
    @value NVARCHAR(MAX), -- the value as a string  
  
    @SequenceNo int, -- the sequence number within a list  
  
    @name NVARCHAR(200), --the name as a string  
  
    @parent_ID INT,--the next parent ID to allocate  
  
    @lenJSON INT,--the current length of the JSON String  
  
    @characters NCHAR(36),--used to convert hex to decimal  
  
    @result BIGINT,--the value of the hex symbol being parsed  
  
    @index SMALLINT,--used for parsing the hex value  
  
    @Escape INT --the index of the next escape character  
  
     
  
   
  
  DECLARE @Strings TABLE /* in this temporary table we keep all strings, even the names of the elements, since they are 'escaped' in a different way, and may contain, unescaped, brackets denoting objects or lists. These are replaced in the JSON string by tokens representing the string */  
  
    (  
  
     String_ID INT IDENTITY(1, 1),  
  
     StringValue NVARCHAR(MAX)  
  
    )  
  
  SELECT--initialise the characters to convert hex to ascii  
  
    @characters='0123456789abcdefghijklmnopqrstuvwxyz',  
  
    @SequenceNo=0, --set the sequence no. to something sensible.  
  
  /* firstly we process all strings. This is done because [{} and ] aren't escaped in strings, which complicates an iterative parse. */  
  
    @parent_ID=0;  
  
  WHILE 1=1 --forever until there is nothing more to do  
  
    BEGIN  
  
      SELECT  
  
        @start=PATINDEX('%[^a-zA-Z]["]%', @json collate SQL_Latin1_General_CP850_Bin);--next delimited string  
  
      IF @start=0 BREAK --no more so drop through the WHILE loop  
  
      IF SUBSTRING(@json, @start+1, 1)='"'  
  
        BEGIN --Delimited Name  
  
          SET @start=@Start+1;  
  
          SET @end=PATINDEX('%[^\]["]%', RIGHT(@json, LEN(@json+'|')-@start));  
  
        END  
  
      IF @end=0 --no end delimiter to last string  
  
        BREAK --no more  
  
      SELECT @token=SUBSTRING(@json, @start+1, @end-1)  
  
      --now put in the escaped control characters  
  
      SELECT @token=REPLACE(@token, FROMString, TOString)  
  
      FROM  
  
        (SELECT  
  
          '\"' AS FromString, '"' AS ToString  
  
         UNION ALL SELECT '\\', '\'  
  
         UNION ALL SELECT '\/', '/'  
  
         UNION ALL SELECT '\b', CHAR(08)  
  
         UNION ALL SELECT '\f', CHAR(12)  
  
         UNION ALL SELECT '\n', CHAR(10)  
  
         UNION ALL SELECT '\r', CHAR(13)  
  
         UNION ALL SELECT '\t', CHAR(09)  
  
        ) substitutions  
  
      SELECT @result=0, @escape=1  
  
  --Begin to take out any hex escape codes  
  
      WHILE @escape>0  
  
        BEGIN  
  
          SELECT @index=0,  
  
          --find the next hex escape sequence  
  
          @escape=PATINDEX('%\x[0-9a-f][0-9a-f][0-9a-f][0-9a-f]%', @token)  
  
          IF @escape>0 --if there is one  
  
            BEGIN  
  
              WHILE @index<4 --there are always four digits to a \x sequence    
  
                BEGIN  
  
                  SELECT --determine its value  
  
                    @result=@result+POWER(16, @index)  
  
                    *(CHARINDEX(SUBSTRING(@token, @escape+2+3-@index, 1),  
  
                                @characters)-1), @index=@index+1 ;  
  
          
  
                END  
  
                -- and replace the hex sequence by its unicode value  
  
              SELECT @token=STUFF(@token, @escape, 6, NCHAR(@result))  
  
            END  
  
        END  
  
      --now store the string away  
  
      INSERT INTO @Strings (StringValue) SELECT @token  
  
      -- and replace the string with a token  
  
      SELECT @JSON=STUFF(@json, @start, @end+1,  
  
                    '@string'+CONVERT(NVARCHAR(5), @@identity))  
  
    END  
  
  -- all strings are now removed. Now we find the first leaf.   
  
  WHILE 1=1  --forever until there is nothing more to do  
  
  BEGIN  
  
   
  
  SELECT @parent_ID=@parent_ID+1  
  
  --find the first object or list by looking for the open bracket  
  
  SELECT @FirstObject=PATINDEX('%[{[[]%', @json collate SQL_Latin1_General_CP850_Bin)--object or array  
  
  IF @FirstObject = 0 BREAK  
  
  IF (SUBSTRING(@json, @FirstObject, 1)='{')  
  
    SELECT @NextCloseDelimiterChar='}', @type='object'  
  
  ELSE  
  
    SELECT @NextCloseDelimiterChar=']', @type='array'  
  
  SELECT @OpenDelimiter=@firstObject  
  
   
  
  WHILE 1=1 --find the innermost object or list...  
  
    BEGIN  
  
      SELECT  
  
        @lenJSON=LEN(@JSON+'|')-1  
  
  --find the matching close-delimiter proceeding after the open-delimiter  
  
      SELECT  
  
        @NextCloseDelimiter=CHARINDEX(@NextCloseDelimiterChar, @json,  
  
                                      @OpenDelimiter+1)  
  
  --is there an intervening open-delimiter of either type  
  
      SELECT @NextOpenDelimiter=PATINDEX('%[{[[]%',  
  
             RIGHT(@json, @lenJSON-@OpenDelimiter)collate SQL_Latin1_General_CP850_Bin)--object  
  
      IF @NextOpenDelimiter=0  
  
        BREAK  
  
      SELECT @NextOpenDelimiter=@NextOpenDelimiter+@OpenDelimiter  
  
      IF @NextCloseDelimiter<@NextOpenDelimiter  
  
        BREAK  
  
      IF SUBSTRING(@json, @NextOpenDelimiter, 1)='{'  
  
        SELECT @NextCloseDelimiterChar='}', @type='object'  
  
      ELSE  
  
        SELECT @NextCloseDelimiterChar=']', @type='array'  
  
      SELECT @OpenDelimiter=@NextOpenDelimiter  
  
    END  
  
  ---and parse out the list or name/value pairs  
  
  SELECT  
  
    @contents=SUBSTRING(@json, @OpenDelimiter+1,  
  
                        @NextCloseDelimiter-@OpenDelimiter-1)  
  
  SELECT  
  
    @JSON=STUFF(@json, @OpenDelimiter,  
  
                @NextCloseDelimiter-@OpenDelimiter+1,  
  
                '@'+@type+CONVERT(NVARCHAR(5), @parent_ID))  
  
  WHILE (PATINDEX('%[A-Za-z0-9@+.e]%', @contents collate SQL_Latin1_General_CP850_Bin))<>0  
  
    BEGIN  
  
      IF @Type='Object' --it will be a 0-n list containing a string followed by a string, number,boolean, or null  
  
        BEGIN  
  
          SELECT  
  
            @SequenceNo=0,@end=CHARINDEX(':', ' '+@contents)--if there is anything, it will be a string-based name.  
  
          SELECT  @start=PATINDEX('%[^A-Za-z@][@]%', ' '+@contents)--AAAAAAAA  
  
          SELECT @token=SUBSTRING(' '+@contents, @start+1, @End-@Start-1),  
  
            @endofname=PATINDEX('%[0-9]%', @token collate SQL_Latin1_General_CP850_Bin),  
  
            @param=RIGHT(@token, LEN(@token)-@endofname+1)  
  
          SELECT  
  
            @token=LEFT(@token, @endofname-1),  
  
            @Contents=RIGHT(' '+@contents, LEN(' '+@contents+'|')-@end-1)  
  
          SELECT  @name=stringvalue FROM @strings  
  
            WHERE string_id=@param --fetch the name  
  
        END  
  
      ELSE  
  
        SELECT @Name=null,@SequenceNo=@SequenceNo+1  
  
      SELECT  
  
        @end=CHARINDEX(',', @contents)-- a string-token, object-token, list-token, number,boolean, or null  
  
      IF @end=0  
  
        SELECT  @end=PATINDEX('%[A-Za-z0-9@+.e][^A-Za-z0-9@+.e]%', @Contents+' ')  
  
          +1  
  
       SELECT  
  
        @start=PATINDEX('%[^A-Za-z0-9@+.e][A-Za-z0-9@+.e]%', ' '+@contents)  
  
      --select @start,@end, LEN(@contents+'|'), @contents   
  
      SELECT  
  
        @Value=RTRIM(SUBSTRING(@contents, @start, @End-@Start)),  
  
        @Contents=RIGHT(@contents+' ', LEN(@contents+'|')-@end)  
  
      IF SUBSTRING(@value, 1, 7)='@object'  
  
        INSERT INTO @hierarchy  
  
          (NAME, SequenceNo, parent_ID, StringValue, Object_ID, ValueType)  
  
          SELECT @name, @SequenceNo, @parent_ID, SUBSTRING(@value, 8, 5),  
  
            SUBSTRING(@value, 8, 5), 'object'  
  
      ELSE  
  
        IF SUBSTRING(@value, 1, 6)='@array'  
  
          INSERT INTO @hierarchy  
  
            (NAME, SequenceNo, parent_ID, StringValue, Object_ID, ValueType)  
  
            SELECT @name, @SequenceNo, @parent_ID, SUBSTRING(@value, 7, 5),  
  
              SUBSTRING(@value, 7, 5), 'array'  
  
        ELSE  
  
          IF SUBSTRING(@value, 1, 7)='@string'  
  
            INSERT INTO @hierarchy  
  
              (NAME, SequenceNo, parent_ID, StringValue, ValueType)  
  
              SELECT @name, @SequenceNo, @parent_ID, stringvalue, 'string'  
  
              FROM @strings  
  
              WHERE string_id=SUBSTRING(@value, 8, 5)  
  
          ELSE  
  
            IF @value IN ('true', 'false')  
  
              INSERT INTO @hierarchy  
  
                (NAME, SequenceNo, parent_ID, StringValue, ValueType)  
  
                SELECT @name, @SequenceNo, @parent_ID, @value, 'boolean'  
  
            ELSE  
  
              IF @value='null'  
  
                INSERT INTO @hierarchy  
  
                  (NAME, SequenceNo, parent_ID, StringValue, ValueType)  
  
                  SELECT @name, @SequenceNo, @parent_ID, @value, 'null'  
  
              ELSE  
  
                IF PATINDEX('%[^0-9]%', @value collate SQL_Latin1_General_CP850_Bin)>0  
  
                  INSERT INTO @hierarchy  
  
                    (NAME, SequenceNo, parent_ID, StringValue, ValueType)  
  
                    SELECT @name, @SequenceNo, @parent_ID, @value, 'real'  
  
                ELSE  
  
                  INSERT INTO @hierarchy  
  
                    (NAME, SequenceNo, parent_ID, StringValue, ValueType)  
  
                    SELECT @name, @SequenceNo, @parent_ID, @value, 'int'  
  
      if @Contents=' ' Select @SequenceNo=0  
  
    END  
  
  END  
  
INSERT INTO @hierarchy (NAME, SequenceNo, parent_ID, StringValue, Object_ID, ValueType)  
  
  SELECT '-',1, NULL, '', @parent_id-1, @type  
  
--  
  
   RETURN  
  
END  
GO

 

调用事例:

declare @Json nvarchar(max) --json数据集合


set @Json='{"DengJiId":"1","DengJinName":"普通会员","ZheKouLv":"10","IdDing":"0","DingHuoJia":"1.00"},{"DengJiId":"2","DengJinName":"一级订货商","ZheKouLv":"50","IdDing":"0","DingHuoJia":"5.00"} '
SELECT * FROM huo.[parseJSON] (
 @Json)--可查看处理好的json数据到表

declare @count int
select @count=COUNT(*) from
(SELECT parent_ID FROM huo.[parseJSON] (
 @Json) group by parent_ID having parent_ID is not null) as a--得到有多少条数据

--循环取出每个键值对

declare @a int
set @a=1
while @a<=@count
begin
declare @DengJiId int--等级id
SELECT @DengJiId=StringValue FROM huo.[parseJSON] (@Json)  where parent_ID=@a and NAME='DengJiId'    --NAME是json数据定义好的键值,StringValue 是定义好的值
--select @DengJiId 

declare @DengJinName nvarchar(50)--等级名称
SELECT @DengJinName=StringValue FROM huo.[parseJSON] (@Json)  where parent_ID=@a and NAME='DengJinName'
--select @DengJinName

end

 

 

 

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