2
我有一個JSON結構,其中有部分,由多個渲染,它由多個字段組成。你怎麼打開陣列的數組
如何在最低級別(字段)上執行1個OPENJSON調用以從中獲取所有信息?
下面是一個例子JSON:
Declare @layout NVARCHAR(MAX) = N'
{
"Sections": [
{
"SectionName":"Section1",
"SectionOrder":1,
"Renders":[
{
"RenderName":"Render1",
"RenderOrder":1,
"Fields":[
{
"FieldName":"Field1",
"FieldData":"Data1"
},
{
"FieldName":"Field2",
"FieldData":"Data2"
}
]
},
{
"RenderName":"Render2",
"RenderOrder":2,
"Fields":[
{
"FieldName":"Field1",
"FieldData":"Data1"
},
{
"FieldName":"Field2",
"FieldData":"Data2"
}
]
}
]
},
{
"SectionName":"Section2",
"SectionOrder":2,
"Renders":[
{
"RenderName":"Render1",
"RenderOrder":1,
"Fields":[
{
"FieldName":"Field1",
"FieldData":"Data1"
}
]
},
{
"RenderName":"Render2",
"RenderOrder":2,
"Fields":[
{
"FieldName":"Field1",
"FieldData":"Data1"
},
{
"FieldName":"Field2",
"FieldData":"Data2"
}
]
}
]
}
]
}
'
下面是一個嵌套OPENJSON電話,其工作方式的代碼的例子,但很複雜,不能動態地生成,我該如何讓一個級別的呼叫?
SELECT SectionName, SectionOrder, RenderName, RenderOrder, FieldName, FieldData FROM (
SELECT SectionName, SectionOrder, RenderName, RenderOrder, Fields FROM (
select SectionName, SectionOrder, Renders
from OPENJSON(@layout,'$.Sections')
WITH (
SectionName nvarchar(MAX) '$.SectionName',
SectionOrder nvarchar(MAX) '$.SectionOrder',
Renders nvarchar(MAX) '$.Renders' as JSON
)
) as Sections
CROSS APPLY OPENJSON(Renders,'$')
WITH (
RenderName nvarchar(MAX) '$.RenderName',
RenderOrder nvarchar(MAX) '$.RenderOrder',
Fields nvarchar(MAX) '$.Fields' as JSON
)
) as Renders
CROSS APPLY OPENJSON(Fields,'$')
WITH (
FieldName nvarchar(MAX) '$.FieldName',
FieldData nvarchar(MAX) '$.FieldData'
)
這是我想達到的目標:
select FieldName, FieldData
from OPENJSON(@layout,'$.Sections.Renders.Fields')
WITH (
FieldName nvarchar(MAX) '$.Sections.Renders.Fields.FieldName',
FieldData nvarchar(MAX) '$.Sections.Renders.Fields.FieldData'
)
我認爲你必須保持'CROSS APPLY'ing - 也就是說,我不知道你可以在一個'OPENJSON'中。 [這個答案能讓你得到你需要的東西](https://stackoverflow.com/a/37218450/1028230)? – ruffin