如何将嵌套的JSON数组插入SQL Server表

亵渎

我正在尝试使用SQL Server的“ OPENJSON WITH（...”语法）将JSON文件插入表中。但是，此文件包含嵌套数组，我不知道该如何处理。

这是我的JSON文件：

}
    "Person_ID":["7120","4816","6088"],
    "Occupant_Type":["ADT","SCD","MCD"],
    "Occupant_Gender":["M","F","M"],
    "Occupant_Height":[180,102,127],
    "Occupant_Weight":[68,20,22],
    "Occupant_Age":[23,2.5,5.5],
    "Occupied_Region":[],
    "Occupant_Type_Region":[]
}

这是我尝试使用的代码：

DECLARE @test_data varchar(max)

SELECT @test_data = BulkColumn
FROM OPENROWSET (BULK 'C:\Users\ofiri\OneDrive\Desktop\אופיר\BWR\Data for testing\chevrolet_spark json files\03.03.2020 copy14', SINGLE_CLOB) import 


insert into Person1([ID])
select [ID]
from openjson(@test_data,'$."Person_ID"')
with(
    [ID] VARCHAR '$."Person_ID"'
)

cross apply 

openjson (@test_data,'$."Occupant_Type"')

但是，在运行代码之后，表中的所有属性均为null。

如何将值插入表格？

佐罗夫

语法可能有所不同，并且取决于预期的结果。当然，目标表的结构也很重要。请注意，问题中的JSON有输入错误。正确的JSON是：

DECLARE @json nvarchar(max) = N'
{
    "Person_ID":["7120","4816","6088"],
    "Occupant_Type":["ADT","SCD","MCD"],
    "Occupant_Gender":["M","F","M"],
    "Occupant_Height":[180,102,127],
    "Occupant_Weight":[68,20,22],
    "Occupant_Age":[23,2.5,5.5],
    "Occupied_Region":[],
    "Occupant_Type_Region":[]
}'

您OPENSON()通话中的错误是错误的路径-$.Person_ID而不是$。如果要分别解析每个嵌套的JSON数组，则应使用OPENJSON()显式架构，正确的语句是：

SELECT [ID]
FROM OPENJSON (@json, '$.Person_ID') WITH ([ID] varchar(4) '$')

结果是：

但是，如果JSON拥有不同人的信息，则可能应使用OPENJSON()默认模式和类似以下的语句：

SELECT 
   j1.[value] AS Person_ID, 
   j2.[value] AS Occupant_Type, 
   j3.[value] AS Occupant_Gender,
   j4.[value] AS Occupant_Height,
   j5.[value] AS Occupant_Weight,
   j6.[value] AS Occupant_Age,
   j7.[value] AS Occupied_Region,
   j8.[value] AS Occupant_Type_Region
FROM OPENJSON(@json, '$."Person_ID"') j1
FULL JOIN OPENJSON(@json, '$."Occupant_Type"') j2 ON j1.[key] = j2.[key]
FULL JOIN OPENJSON(@json, '$."Occupant_Gender"') j3 ON j1.[key] = j3.[key]
FULL JOIN OPENJSON(@json, '$."Occupant_Height"') j4 ON j1.[key] = j4.[key]
FULL JOIN OPENJSON(@json, '$."Occupant_Weight"') j5 ON j1.[key] = j5.[key]
FULL JOIN OPENJSON(@json, '$."Occupant_Age"') j6 ON j1.[key] = j6.[key]
FULL JOIN OPENJSON(@json, '$."Occupied_Region"') j7 ON j1.[key] = j7.[key]
FULL JOIN OPENJSON(@json, '$."Occupant_Type_Region"') j8 ON j1.[key] = j8.[key]

结果：

Person_ID   Occupant_Type Occupant_Gender Occupant_Height Occupant_Weight Occupant_Age Occupied_Region Occupant_Type_Region
7120        ADT           M               180             68              23           
4816        SCD           F               102             20              2.5          
6088        MCD           M               127             22              5.5

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