使用子查询和联合的JSON文件

问题描述

我知道我之前也曾问过类似的问题，但我想就我要实现的目标发表清晰的文章。我已经按照预期工作了大部分，但现在我正试图使用子查询来正确格式化JSON。我的查询在下面


SELECT
    
'Admin User TEST ONLY PLEASE IGnorE' AS AdditionalNotes,(
        SELECT * FROM
        (
            SELECT 
                    ax.Acc_fault1 AS [atFault],ax.Acc_desc1 AS [claimDetails],ax.Acc_fault1 AS [claimstatus],ax.Acc_type1 AS [claimType],ax.Acc_date1 AS [dateOfClaim],ax.Acc_injury1 AS [injuryInvolved],ax.Acc_ncb1 AS [ncdAffected],'' AS [settledDate],ax.Acc_amt1 AS [totalCost]
            union
            SELECT 
                    ax.Acc_fault2 AS [atFault],ax.Acc_desc2 AS [claimDetails],ax.Acc_fault2 AS [claimstatus],ax.Acc_type2 AS [claimType],ax.Acc_date2 AS [dateOfClaim],ax.Acc_injury2 AS [injuryInvolved],ax.Acc_ncb2 AS [ncdAffected],ax.Acc_amt2 AS [totalCost]
            union
            SELECT 
                    ax.Acc_fault3 AS [atFault],ax.Acc_desc3 AS [claimDetails],ax.Acc_fault3 AS [claimstatus],ax.Acc_type3 AS [claimType],ax.Acc_date3 AS [dateOfClaim],ax.Acc_injury3 AS [injuryInvolved],ax.Acc_ncb3 AS [ncdAffected],ax.Acc_amt3 AS [totalCost]
            union
            SELECT  
                    ax.Acc_fault4 AS [atFault],ax.Acc_desc4 AS [claimDetails],ax.Acc_fault4 AS [claimstatus],ax.Acc_type4 AS [claimType],ax.Acc_date4 AS [dateOfClaim],ax.Acc_injury4 AS [injuryInvolved],ax.Acc_ncb4 AS [ncdAffected],ax.Acc_amt4 AS [totalCost]
            union
            SELECT  
                    ax.Acc_fault5 AS [atFault],ax.Acc_desc5 AS [claimDetails],ax.Acc_fault5 AS [claimstatus],ax.Acc_type5 AS [claimType],ax.Acc_date5 AS [dateOfClaim],ax.Acc_injury5 AS [injuryInvolved],ax.Acc_ncb5 AS [ncdAffected],ax.Acc_amt5 AS [totalCost]      
                )           
            AS [MotorRiskQueryInsuredPartyClaims]
        FOR JSON PATH
    ) AS  [MotorRiskQueryInsuredParties]

FROM

    dbo.icp_Daprospect AS p INNER JOIN
    dbo.icp_Dapolicy AS d ON p.Branch@ = d.Branch@ AND p.ClientRef@ = d.ClientRef@ LEFT OUTER JOIN
    dbo.icp_DP_PC AS c ON p.Branch@ = c.Branch@ AND d.PolicyRef@ = c.PolicyRef@ LEFT OUTER JOIN
    dbo.icp_DP_CF AS e ON p.Branch@ = e.Branch@ AND d.PolicyRef@ = e.PolicyRef@ LEFT OUTER JOIN
    dbo.ic_DP_AX AS  ax ON P.Branch@ = ax.B@ AND ax.PolRef@ = d.PolicyRef@ LEFT OUTER JOIN
    dbo.icp_QR54_VT AS i on e.Current_insurer_QR54_VTId = i.VTId
WHERE 
    
    d.PolicyRef@ = 'AAAA001PC1' AND
    d.Branch@ = 0


FOR JSON PATH

我得到的输出：

{"AdditionalNotes":"Admin User TEST ONLY PLEASE IGnorE","MotorRiskQueryInsuredParties":[
    
    {"settledDate":"","totalCost":0},{"atFault":"No blame","claimDetails":"Hit by TP in Rear","claimstatus":"No blame","claimType":"Accident","dateOfClaim":"2015-06-01T00:00:00","injuryInvolved":"No","ncdAffected":"No","settledDate":"","totalCost":50},{"atFault":"Yes","claimDetails":"Hit TP in Rear","claimstatus":"Yes","dateOfClaim":"2012-09-01T00:00:00","ncdAffected":"Yes","totalCost":50}]}

我想要实现的输出是：


{"AdditionalNotes":"Admin User TEST ONLY PLEASE IGnorE","MororRiskQueryInsuredParties": [
        {
            "MotorRiskInsuredPartyClaims": [
                {
                    "atFault": No blame
                    "claimDetails": Hit by TP in Rear
                    "claimstatus": No blame
                    "claimType": Accident
                    "dateOfClaim": 2015-06-01T00:00:00
                    "injuryInvolved": No
                    "ncdAffected": No
                    "settledDate": Null
                    "totalCost": 50
                },{
                    "atFault": Yes
                    "claimDetails": Hit TP in Rear
                    "claimstatus": Yes
                    "claimType": Accident
                    "dateOfClaim": 2012-09-01T00:00:00
                    "injuryInvolved": No
                    "ncdAffected": No
                    "settledDate": Null
                    "totalCost": 50
                },{
                    "atFault": null
                    "claimDetails": null
                    "claimstatus": null
                    "claimType": null
                    "dateOfClaim": null
                    "injuryInvolved": null
                    "ncdAffected": null
                    "settledDate": null
                    "totalCost": null
                },{
                    "atFault": null
                    "claimDetails": null
                    "claimstatus": null
                    "claimType": null
                    "dateOfClaim": null
                    "injuryInvolved": null
                    "ncdAffected": null
                    "settledDate": null
                    "totalCost": null
                }
            ],

由于某种原因，我得到一个结算日期，总费用出现在顶部，然后我看到了期望的结果。

该JSON文件似乎也忽略了“ MotorRiskInsuredPartyClaims”的子数组文本。

有人能看到我在做什么错吗，希望这很简单。

解决方法

首先，{"settledDate":"","totalCost":0}存根可能是表中一行的结果，该行的五个列集之一具有NULL值（totalCost的值为0，这可能是默认值）。如果要在这种情况下省略对象，请在查询中添加WHERE子句，该子句将大的并集查询包装起来以过滤出空值。

第二，要正确包装JSON，我可以通过为FOR JSON PATH指定ROOT选项来获得所需的输出：

FOR JSON PATH,ROOT('MotorRiskQueryInsuredPartyClaims')

如果没有此选项，则FOR JSON PATH不会将对象包装在根密钥下，因此您的第二个“ AS”只是对别名进行重新别名。

json sql-server