借助CLR，首先實(shí)現(xiàn)字符串的互轉(zhuǎn)，然后使用存儲(chǔ)過程實(shí)現(xiàn)JSON2table

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public class JsonFunction

???{

???????/// <summary>

???????/// XML轉(zhuǎn)JSON

???????/// </summary>

???????/// <param name="xml"></param>

???????/// <returns></returns>

???????/// <remarks>

???????/// json不建議太長

???????/// </remarks>

???????[Microsoft.SqlServer.Server.SqlFunction(Name = "Xml2Json")]

???????public static SqlString Xml2Json(SqlXml xml)

???????{

???????????System.Xml.XmlDocument doc = new System.Xml.XmlDocument();

???????????doc.LoadXml(xml.Value);

???????????string json = JsonConvert.SerializeXmlNode(doc, Formatting.Indented);

???????????doc.Clone();

???????????return new SqlString(json);

???????}

???????[Microsoft.SqlServer.Server.SqlFunction(Name = "Json2Xml")]

???????public static SqlXml Json2Xml(string json)

???????{

???????????System.Xml.XmlDocument doc = JsonConvert.DeserializeXmlNode(json);

???????????System.IO.StringWriter sw = new System.IO.StringWriter();

???????????doc.WriteTo(new System.Xml.XmlTextWriter(sw));

???????????return new SqlXml(new System.Xml.XmlTextReader(new System.IO.StringReader(sw.ToString())));

???????}

???????[Microsoft.SqlServer.Server.SqlProcedure(Name = "Json2Table")]

???????public static void Json2Table(string path, string json)

???????{

???????????System.Xml.XmlDocument doc = JsonConvert.DeserializeXmlNode(json);

???????????System.Xml.XmlNodeList list = null;

???????????if (!string.IsNullOrEmpty(path))

???????????????list = doc.SelectNodes(path);

???????????else

???????????????list = doc.ChildNodes;

???????????if (list == null || list.Count == 0)

???????????????return;

???????????List<SqlMetaData> metas = new List<SqlMetaData>();

???????????string lastName = "";

???????????bool flag = false;

???????????for (int i = 0; i < list[0].ChildNodes.Count; i++)

???????????{

???????????????if (lastName == list[0].ChildNodes[i].Name)

???????????????{

???????????????????flag = true;

???????????????????break;

???????????????}

???????????????else

???????????????????lastName = list[0].ChildNodes[i].Name;

???????????????metas.Add(new SqlMetaData(list[0].ChildNodes[i].Name, SqlDbType.NVarChar, SqlMetaData.Max));

???????????}

???????????var rec = new SqlDataRecord(metas.ToArray());

???????????SqlContext.Pipe.SendResultsStart(rec);

???????????foreach (System.Xml.XmlNode node in list)

???????????{

???????????????if (flag)//行模式

???????????????????for (int i = 0; i < node.ChildNodes.Count; i++)

???????????????????{

???????????????????????rec.SetString(0, node.ChildNodes[i].InnerXml);

???????????????????????SqlContext.Pipe.SendResultsRow(rec);

???????????????????}

???????????????else

???????????????{

???????????????????for (int i = 0; i < metas.Count; i++)

???????????????????{

???????????????????????rec.SetString(i, node.ChildNodes[i].InnerXml);

???????????????????}

???????????????????SqlContext.Pipe.SendResultsRow(rec);

???????????????}

???????????}

???????????SqlContext.Pipe.SendResultsEnd();

???????}

???????//public static void Json2Table(string json)

???????//{

???????// //find first array

???????// Q.Json.Linq.JObject jo = JsonConvert.DeserializeObject(json) as Q.Json.Linq.JObject;

???????// Q.Json.Linq.JToken token = jo.First;

???????// while (token != null && token.Type != Q.Json.Linq.JTokenType.Array)

???????// {

???????// token = token.First;

???????// }

???????// if (token == null)

???????// return;

???????// Q.Json.Linq.JArray array = token as Q.Json.Linq.JArray;

???????// if (array.Count == 0)

???????// return;

???????// List<SqlMetaData> metas = new List<SqlMetaData>();

???????// token = array[0].First;

???????// while (token != null)

???????// {

???????// metas.Add(new SqlMetaData((token as Q.Json.Linq.JProperty).Name, SqlDbType.NVarChar, SqlMetaData.Max));

???????// token = token.Next;

???????// }

???????// var rec = new SqlDataRecord(metas.ToArray());

???????// SqlContext.Pipe.SendResultsStart(rec);

???????// foreach (var item in array)

???????// {

???????// for (int i = 0; i < metas.Count; i++)

???????// {

???????// rec.SetString(i, item[metas[i].Name].ToString());

???????// }

???????// SqlContext.Pipe.SendResultsRow(rec);

???????// }

???????// SqlContext.Pipe.SendResultsEnd();

???????//}

???}

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測(cè)試語句

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DROP TABLE test

CREATE TABLE TEST ( NAME VARCHAR(5), DATA XML )

GO

INSERT INTO TEST

VALUES ( 'A', '<ROOT><M>AAAA</M></ROOT>' )

????????,

????????( 'B', '<ROOT><D>00000</D></ROOT>' )

, ( 'C', '123' )

SELECT *

FROM test

--DECLARE @X XML

--SELECT @x = ( SELECT *

-- FROM test

-- FOR

-- XML AUTO ,

-- ELEMENTS ,

-- ROOT

-- )

--SELECT @x

--DECLARE @json NVARCHAR(MAX)

--SELECT @json = dbo.xml2json(@x)

--SELECT @json

--SELECT dbo.Json2Xml(@json)

SELECT dbo.Xml2Json(( SELECT *

???????????????????????FROM test

?????????????????????FOR

???????????????????????XML AUTO ,

???????????????????????????ELEMENTS ,

???????????????????????????ROOT

?????????????????????)) xml2json

SELECT dbo.Json2Xml(dbo.Xml2Json(( SELECT *

????????????????????????????????????FROM test

??????????????????????????????????FOR

????????????????????????????????????XML AUTO ,

????????????????????????????????????????ELEMENTS ,

????????????????????????????????????????ROOT

??????????????????????????????????))) json2xml

DECLARE @json NVARCHAR(MAX)

SET @json = dbo.Xml2Json(( SELECT *

???????????????????????????FROM test

?????????????????????????FOR

???????????????????????????XML AUTO ,

???????????????????????????????ELEMENTS ,

???????????????????????????????ROOT

?????????????????????????))

EXECUTE dbo.json2table 'root/test', @json

EXECUTE dbo.json2table '', @json

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執(zhí)行效果

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參考

http://www.json4sql.com/examples.html

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https://www.simple-talk.com/sql/t-sql-programming/consuming-json-strings-in-sql-server/

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轉(zhuǎn)載于:https://www.cnblogs.com/QinQouShui/p/4402208.html

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