TSQL更新

Question

我被困在更新/插入來自JSON數組行到SQL Server 2017

我有以下結構：

{ 
    "ID":52, 
    "Name":"Mark", 
    "Surname":"Blake", 
    "Age": 24 
    "Cars":[ 
     {"ID":110,"Volvo":"2001-10-01","Color":"red"}, 
     {"ID":110,"Volvo":"2001-10-01","Color":"red"}, 
     {"ID":110,"Volvo":"2001-10-01","Color":"red"}, 
     {"ID":-1,"Volvo":"2001-10-01","Color":"red"}, 
     {"ID":-1,"Volvo":"2001-10-01","Color":"red"}, 
    ] 
} 

我試圖做一個合併基礎上Cars數組，當ID爲-1時插入到表中，否則更新。

如何實現這一目標？

好的，我做到了，但我又遇到了另一個問題。 我想從更高的層次也得到ID（我的意思是52在這種情況下），它應該是這樣的：

110 52 2001-10-01 red 
110 52 2001-10-01 red 
110 52 2001-10-01 red 
-1 52 2001-10-01 red 
-1 52 2001-10-01 red 

Answer 1

我定你JSON，這是一個有點不正確。

DECLARE @json nvarchar(max) = '{ 
    "ID":52, 
    "Name":"Mark", 
    "Surname":"Blake", 
    "Age": 24, 
    "Cars":[ 
     {"ID":110,"Volvo":"2001-10-01","Color":"red"}, 
     {"ID":110,"Volvo":"2001-10-01","Color":"red"}, 
     {"ID":110,"Volvo":"2001-10-01","Color":"red"}, 
     {"ID":-1,"Volvo":"2001-10-01","Color":"red"}, 
     {"ID":-1,"Volvo":"2001-10-01","Color":"red"} 
    ] 
}' 


SELECT JSON_VALUE(t.[value], N'$.ID'), 
     JSON_VALUE(t.[value], N'$.Volvo'), 
     JSON_VALUE(t.[value], N'$.Color') 
FROM OPENJSON(@json, N'$.Cars') as t 

輸出：

110 2001-10-01 red 
110 2001-10-01 red 
110 2001-10-01 red 
-1 2001-10-01 red 
-1 2001-10-01 red 

將在CTE或臨時表，然後合併主表。或者你可以先INSERT（WHERE ID = -1）和UPDATE（WHERE ID != -1）

更新：

SELECT f.[value], 
     JSON_VALUE(c.[value], N'$.ID'), 
     JSON_VALUE(c.[value], N'$.Volvo'), 
     JSON_VALUE(c.[value], N'$.Color') 
FROM OPENJSON(@json) f 
CROSS APPLY OPENJSON(@json,N'$.Cars') c 
WHERE f.[key] IN ('ID') 

輸出：

52 110 2001-10-01 red 
52 110 2001-10-01 red 
52 110 2001-10-01 red 
52 -1 2001-10-01 red 
52 -1 2001-10-01 red