MS SQL OPENJSON JSON，

MS SQL OPENJSON JSON，

前段时间，有写过一个小练习《MS SQL读取JSON数据》https://www.cnblogs.com/insus/p/10911739.html

晚上为一个网友的问题，尝试获取较深层节点的数据。

根据网友的原始数据，改写一个相对较简单的json原始数据：

 

DECLARE @json NVARCHAR(MAX) = N'{"isok":"true", "stateNumber":"1", "data":{"ok":true, "tables":{ "item":[ {"A":"E1","B":"E2","C":"E3"}, {"A":"F1","B":"F2","C":"F3"} ], "SBU":[ {"ID":"001","QTY":"2000","amount":"189.03"} ] } }, "records":"450", "pcounts":"150", "nzsum":"真实采购本页总金额：0.00", "sum":"本页总金额：2140.79", "zsum":"条件查询总金额：0.00" }' Source Code

 

例子一：获取第一层数据：

DECLARE @Path NVARCHAR(128) = N'$' DECLARE @SQL NVARCHAR(MAX) = N'SELECT * FROM OPENJSON(N''' + @json + ''', N''' + @Path + ''')' EXECUTE sp_executesql @Sql DECLARE @SQL1 NVARCHAR(MAX) = N'SELECT * FROM OPENJSON(N''' + @json + ''', N''' + @Path + ''') WITH ( [isok] BIT ''$.isok'', [stateNumber] INT ''$.stateNumber'', [data] NVARCHAR(MAX) AS JSON, [records] INT ''$.records'', [pcounts] INT ''$.pcounts'', [nzsum] NVARCHAR(100) ''$.nzsum'', [sum] NVARCHAR(100) ''$.sum'', [zsum] NVARCHAR(100) ''$.zsum'' ) ' EXECUTE sp_executesql @Sql1 Source Code

 

例子二：获取第二层数据：

 

DECLARE @Path NVARCHAR(128) = N'$."data"' DECLARE @SQL NVARCHAR(MAX) = N'SELECT * FROM OPENJSON(N''' + @json + ''', N''' + @Path + ''')' EXECUTE sp_executesql @Sql DECLARE @SQL1 NVARCHAR(MAX) = N'SELECT * FROM OPENJSON(N''' + @json + ''', N''' + @Path + ''') WITH ( [ok] BIT ''$.ok'', [tables] NVARCHAR(MAX) AS JSON ) ' EXECUTE sp_executesql @Sql1 Source Code

 

例子三：获取第三层数据：

 

DECLARE @Path NVARCHAR(128) = N'$."data".tables' DECLARE @SQL NVARCHAR(MAX) = N'SELECT * FROM OPENJSON(N''' + @json + ''', N''' + @Path + ''')' EXECUTE sp_executesql @Sql DECLARE @SQL1 NVARCHAR(MAX) = N'SELECT * FROM OPENJSON(N''' + @json + ''', N''' + @Path + ''') WITH ( [item] NVARCHAR(MAX) AS JSON, [SBU] NVARCHAR(MAX) AS JSON ) ' EXECUTE sp_executesql @Sql1 Source Code

 

例子四：获取第四层数据：

 

DECLARE @Path NVARCHAR(128) = N'$."data"."tables"."item"' DECLARE @SQL NVARCHAR(MAX) = N'SELECT * FROM OPENJSON(N''' + @json + ''', N''' + @Path + ''')' EXECUTE sp_executesql @Sql DECLARE @SQL1 NVARCHAR(MAX) = N'SELECT * FROM OPENJSON(N''' + @json + ''', N''' + @Path + ''') WITH ( [A] NVARCHAR(10) ''$.A'', [B] NVARCHAR(10) ''$.B'', [C] NVARCHAR(10) ''$.C'' ) ' EXECUTE sp_executesql @Sql1 DECLARE @Path_1 NVARCHAR(128) = N'$."data"."tables"."SBU"' DECLARE @SQL_1 NVARCHAR(MAX) = N'SELECT * FROM OPENJSON(N''' + @json + ''', N''' + @Path_1 + ''')' EXECUTE sp_executesql @Sql_1 DECLARE @SQL_2 NVARCHAR(MAX) = N'SELECT * FROM OPENJSON(N''' + @json + ''', N''' + @Path_1 + ''') WITH ( [ID] NVARCHAR(5) ''$.ID'', [QTY] DECIMAL(18,2) ''$.QTY'', [amount] DECIMAL(18,2) ''$.amount'' ) ' EXECUTE sp_executesql @Sql_2 Source Code