我有2张这样的表：
{
"userSecretsId": "aspnet5-WebApplication7-0b4c05f0-6435-486b-9738-1b6aa3daee2c",
"version": "1.0.0-*",
"compilationOptions": {
"emitEntryPoint": true
},
"dependencies": {
"EntityFramework.Commands": "7.0.0-rc1-final",
"EntityFramework.MicrosoftSqlServer": "7.0.0-rc1-final",
"Microsoft.AspNet.Authentication.Cookies": "1.0.0-rc1-final",
"Microsoft.AspNet.Diagnostics.Entity": "7.0.0-rc1-final",
"Microsoft.AspNet.Identity.EntityFramework": "3.0.0-rc1-final",
"Microsoft.AspNet.IISPlatformHandler": "1.0.0-rc1-final",
"Microsoft.AspNet.Mvc": "6.0.0-rc1-final",
"Microsoft.AspNet.Mvc.TagHelpers": "6.0.0-rc1-final",
"Microsoft.AspNet.Server.Kestrel": "1.0.0-rc1-final",
"Microsoft.AspNet.StaticFiles": "1.0.0-rc1-final",
"Microsoft.AspNet.Tooling.Razor": "1.0.0-rc1-final",
"Microsoft.Extensions.CodeGenerators.Mvc": "1.0.0-rc1-final",
"Microsoft.Extensions.Configuration.FileProviderExtensions": "1.0.0-rc1-final",
"Microsoft.Extensions.Configuration.Json": "1.0.0-rc1-final",
"Microsoft.Extensions.Configuration.UserSecrets": "1.0.0-rc1-final",
"Microsoft.Extensions.Logging": "1.0.0-rc1-final",
"Microsoft.Extensions.Logging.Console": "1.0.0-rc1-final",
"Microsoft.Extensions.Logging.Debug": "1.0.0-rc1-final",
"Microsoft.VisualStudio.Web.BrowserLink.Loader": "14.0.0-rc1-final",
"System.Net.Http": "4.0.1-beta-23516",
"Foo": "1.0.0-beta-1"
},
"commands": {
"web": "Microsoft.AspNet.Server.Kestrel",
"ef": "EntityFramework.Commands"
},
"frameworks": {
"dnx451": { }
},
"exclude": [
"wwwroot",
"node_modules"
],
"publishExclude": [
"**.user",
"**.vspscc"
],
"scripts": {
"prepublish": [ "npm install", "bower install", "gulp clean", "gulp min" ]
}
}
：CT，Number，CtID，Date CTIE：VT，Number，VtID 我的代码：
Quantities此代码工作正常，但结果不是我想要的。某些SELECT
MAX(CT.Date), MAX(CT.CtID), VT.VtID,
SUM(VT.Quantities) AS SumVT,
CASE
WHEN CT.CTIE = 0 THEN SUM(VT.Quantities)
ELSE 0
END AS IMPORT,
CASE
WHEN CT.CTIE = 1 THEN SUM(VT.Quantities)
ELSE 0
END AS EXPORT
FROM
CT
INNER JOIN
VT ON CT.Number = VT.Number
GROUP BY
VT.VtID, CT.CTIE
ORDER BY
VT.VtID
同时包含VtID和CTIE = 1，SQL现在返回2个具有相同CTIE = 1的单独行，一个用于VtID，另一行用于CTIE = 0 }。但我需要它只为每个CTIE = 1而不是2显示一行。
答案 0 :(得分：0)
删除组中的CT.CTIE并将您的case语句放在聚合函数
SElECT
MAX(CT.Date), MAX(CT.CtID), VT.VtID, SUM(VT.Quantities) AS SumVT,
SUM(CASE WHEN CT.CTIE = 0 THEN VT.Quantities ELSE 0 END) AS IMPORT,
SUM(CASE WHEN CT.CTIE = 1 THEN VT.Quantities ELSE 0 END) AS EXPORT
FROM CT INNER JOIN VT ON CT.Number=VT.Number
GROUP BY VT.VtID
ORDER by VT.VtID