SQL - 显示记录的计数，即使为0

Question

我正在尝试在MS Access中创建一个SQL查询，该查询将显示员工在当月的约会数，即使它是0.这与this问题非常相似，但我可以＆ ＃39;让它使用WHERE子句。

我有3张桌子：

tblEmployees
-employeeID PK
-FirstName ETC

tblEngineersAppts1
-ApptID PK
-EmployeeID*

tblEngineersAppts2
-DiaryID PK
-ApptDate
-ApptID*

我想在tblEngineersAppts2中向所有员工展示所有约会（DiaryID）的COUNT，即使ApptDate当前月份没有。 这是我的查询，它只显示当月有约会的员工，但没有显示那些没有约会的员工。

SELECT tblEmployees.EmployeeID, Count(tblEngineersAppts2.DiaryID) AS CountOfDiaryID
FROM (tblEmployees
LEFT JOIN tblEngineersAppts1 ON tblEmployees.EmployeeID = tblEngineersAppts1.EmployeeID)
LEFT JOIN tblEngineersAppts2 ON tblEngineersAppts1.ApptID = tblEngineersAppts2.ApptID
WHERE (((Format$([ApptDate],'MM/YY'))='03/17'))
GROUP BY tblEmployees.EmployeeID;

由于

Answer 1

问题在于，当您将WHERE条件设为LEFT JOIN INNER JOIN

时

WHERE (((Format$([ApptDate],'MM/YY'))='03/17'))

因此请在ApptDate条件中包含ON约束。

SELECT tblEmployees.EmployeeID, Count(tblEngineersAppts2.DiaryID) AS CountOfDiaryID
FROM (tblEmployees
LEFT JOIN tblEngineersAppts1 ON tblEmployees.EmployeeID = tblEngineersAppts1.EmployeeID)
LEFT JOIN tblEngineersAppts2 
  ON (   tblEngineersAppts1.ApptID = tblEngineersAppts2.ApptID
     AND Format$([ApptDate],'MM/YY')='03/17'
     )
GROUP BY tblEmployees.EmployeeID;

Answer 2

我认为你可以这样做：

org.gradle.api.tasks.TaskExecutionException: Execution failed for task ':myTask:transformClassesWithDexForMyFlavor'.
    at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(ExecuteActionsTaskExecuter.java:84)
    at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.execute(ExecuteActionsTaskExecuter.java:55)
    at org.gradle.api.internal.tasks.execution.SkipUpToDateTaskExecuter.execute(SkipUpToDateTaskExecuter.java:61)
    at org.gradle.api.internal.tasks.execution.ValidatingTaskExecuter.execute(ValidatingTaskExecuter.java:58)
    at org.gradle.api.internal.tasks.execution.SkipEmptySourceFilesTaskExecuter.execute(SkipEmptySourceFilesTaskExecuter.java:88)
    at org.gradle.api.internal.tasks.execution.ResolveTaskArtifactStateTaskExecuter.execute(ResolveTaskArtifactStateTaskExecuter.java:45)
    at org.gradle.api.internal.tasks.execution.SkipTaskWithNoActionsExecuter.execute(SkipTaskWithNoActionsExecuter.java:51)
    at org.gradle.api.internal.tasks.execution.SkipOnlyIfTaskExecuter.execute(SkipOnlyIfTaskExecuter.java:54)
    at org.gradle.api.internal.tasks.execution.ExecuteAtMostOnceTaskExecuter.execute(ExecuteAtMostOnceTaskExecuter.java:43)
    at org.gradle.api.internal.tasks.execution.CatchExceptionTaskExecuter.execute(CatchExceptionTaskExecuter.java:34)
    at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter$EventFiringTaskWorker.execute(DefaultTaskGraphExecuter.java:233)
    at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter$EventFiringTaskWorker.execute(DefaultTaskGraphExecuter.java:215)
    at org.gradle.execution.taskgraph.AbstractTaskPlanExecutor$TaskExecutorWorker.processTask(AbstractTaskPlanExecutor.java:74)
    at org.gradle.execution.taskgraph.AbstractTaskPlanExecutor$TaskExecutorWorker.run(AbstractTaskPlanExecutor.java:55)
    at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor.process(DefaultTaskPlanExecutor.java:32)
    at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter.execute(DefaultTaskGraphExecuter.java:113)
    at org.gradle.execution.SelectedTaskExecutionAction.execute(SelectedTaskExecutionAction.java:37)
    at org.gradle.execution.DefaultBuildExecuter.execute(DefaultBuildExecuter.java:37)
    at org.gradle.execution.DefaultBuildExecuter.access$000(DefaultBuildExecuter.java:23)
    at org.gradle.execution.DefaultBuildExecuter$1.proceed(DefaultBuildExecuter.java:43)
    at org.gradle.execution.DryRunBuildExecutionAction.execute(DryRunBuildExecutionAction.java:32)
    at org.gradle.execution.DefaultBuildExecuter.execute(DefaultBuildExecuter.java:37)
    at org.gradle.execution.DefaultBuildExecuter.execute(DefaultBuildExecuter.java:30)
    at org.gradle.initialization.DefaultGradleLauncher$4.run(DefaultGradleLauncher.java:197)
    at org.gradle.internal.Factories$1.create(Factories.java:25)
    at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:91)
    at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:53)
    at org.gradle.initialization.DefaultGradleLauncher.doBuildStages(DefaultGradleLauncher.java:194)
    at org.gradle.initialization.DefaultGradleLauncher.access$200(DefaultGradleLauncher.java:36)
    at org.gradle.initialization.DefaultGradleLauncher$1.create(DefaultGradleLauncher.java:118)
    at org.gradle.initialization.DefaultGradleLauncher$1.create(DefaultGradleLauncher.java:112)
    at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:91)
    at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:63)
    at org.gradle.initialization.DefaultGradleLauncher.doBuild(DefaultGradleLauncher.java:112)
    at org.gradle.initialization.DefaultGradleLauncher.run(DefaultGradleLauncher.java:98)
    at org.gradle.launcher.exec.GradleBuildController.run(GradleBuildController.java:66)
    at org.gradle.tooling.internal.provider.runner.BuildModelActionRunner.run(BuildModelActionRunner.java:52)
    at org.gradle.launcher.exec.ChainingBuildActionRunner.run(ChainingBuildActionRunner.java:35)
    at org.gradle.tooling.internal.provider.runner.SubscribableBuildActionRunner.run(SubscribableBuildActionRunner.java:58)
    at org.gradle.launcher.exec.ChainingBuildActionRunner.run(ChainingBuildActionRunner.java:35)
    at org.gradle.launcher.exec.InProcessBuildActionExecuter.execute(InProcessBuildActionExecuter.java:41)
    at org.gradle.launcher.exec.InProcessBuildActionExecuter.execute(InProcessBuildActionExecuter.java:26)
    at org.gradle.tooling.internal.provider.ContinuousBuildActionExecuter.execute(ContinuousBuildActionExecuter.java:75)
    at org.gradle.tooling.internal.provider.ContinuousBuildActionExecuter.execute(ContinuousBuildActionExecuter.java:49)
    at org.gradle.tooling.internal.provider.ServicesSetupBuildActionExecuter.execute(ServicesSetupBuildActionExecuter.java:44)
    at org.gradle.tooling.internal.provider.ServicesSetupBuildActionExecuter.execute(ServicesSetupBuildActionExecuter.java:29)
    at org.gradle.launcher.daemon.server.exec.ExecuteBuild.doBuild(ExecuteBuild.java:67)
    at org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:36)
    at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)
    at org.gradle.launcher.daemon.server.exec.WatchForDisconnection.execute(WatchForDisconnection.java:47)
    at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)
    at org.gradle.launcher.daemon.server.exec.ResetDeprecationLogger.execute(ResetDeprecationLogger.java:26)
    at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)
    at org.gradle.launcher.daemon.server.exec.RequestStopIfSingleUsedDaemon.execute(RequestStopIfSingleUsedDaemon.java:34)
    at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)
    at org.gradle.launcher.daemon.server.exec.ForwardClientInput$2.call(ForwardClientInput.java:74)
    at org.gradle.launcher.daemon.server.exec.ForwardClientInput$2.call(ForwardClientInput.java:72)
    at org.gradle.util.Swapper.swap(Swapper.java:38)
    at org.gradle.launcher.daemon.server.exec.ForwardClientInput.execute(ForwardClientInput.java:72)
    at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)
    at org.gradle.launcher.daemon.server.exec.LogAndCheckHealth.execute(LogAndCheckHealth.java:55)
    at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)
    at org.gradle.launcher.daemon.server.exec.LogToClient.doBuild(LogToClient.java:60)
    at org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:36)
    at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)
    at org.gradle.launcher.daemon.server.exec.EstablishBuildEnvironment.doBuild(EstablishBuildEnvironment.java:72)
    at org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:36)
    at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)
    at org.gradle.launcher.daemon.server.exec.StartBuildOrRespondWithBusy$1.run(StartBuildOrRespondWithBusy.java:50)
    at org.gradle.launcher.daemon.server.DaemonStateCoordinator$1.run(DaemonStateCoordinator.java:293)
    at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:54)
    at org.gradle.internal.concurrent.StoppableExecutorImpl$1.run(StoppableExecutorImpl.java:40)
Caused by: java.lang.RuntimeException: com.android.build.api.transform.TransformException: com.android.ide.common.process.ProcessException: java.util.concurrent.ExecutionException: java.lang.RuntimeException: Translation has been interrupted
    at com.android.builder.profile.Recorder$Block.handleException(Recorder.java:55)
    at com.android.builder.profile.ThreadRecorder.record(ThreadRecorder.java:104)
    at com.android.build.gradle.internal.pipeline.TransformTask.transform(TransformTask.java:176)
    at org.gradle.internal.reflect.JavaMethod.invoke(JavaMethod.java:73)
    at org.gradle.api.internal.project.taskfactory.DefaultTaskClassInfoStore$IncrementalTaskAction.doExecute(DefaultTaskClassInfoStore.java:163)
    at org.gradle.api.internal.project.taskfactory.DefaultTaskClassInfoStore$StandardTaskAction.execute(DefaultTaskClassInfoStore.java:134)
    at org.gradle.api.internal.project.taskfactory.DefaultTaskClassInfoStore$StandardTaskAction.execute(DefaultTaskClassInfoStore.java:123)
    at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeAction(ExecuteActionsTaskExecuter.java:95)
    at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(ExecuteActionsTaskExecuter.java:76)
    ... 71 more
Caused by: com.android.build.api.transform.TransformException: com.android.ide.common.process.ProcessException: java.util.concurrent.ExecutionException: java.lang.RuntimeException: Translation has been interrupted
    at com.android.build.gradle.internal.transforms.DexTransform.transform(DexTransform.java:453)
    at com.android.build.gradle.internal.pipeline.TransformTask$2.call(TransformTask.java:185)
    at com.android.build.gradle.internal.pipeline.TransformTask$2.call(TransformTask.java:181)
    at com.android.builder.profile.ThreadRecorder.record(ThreadRecorder.java:102)
    ... 78 more
Caused by: com.android.ide.common.process.ProcessException: java.util.concurrent.ExecutionException: java.lang.RuntimeException: Translation has been interrupted
    at com.android.builder.core.DexByteCodeConverter.dexInProcess(DexByteCodeConverter.java:180)
    at com.android.builder.core.DexByteCodeConverter.runDexer(DexByteCodeConverter.java:158)
    at com.android.builder.core.DexByteCodeConverter.convertByteCode(DexByteCodeConverter.java:143)
    at com.android.builder.core.AndroidBuilder.convertByteCode(AndroidBuilder.java:1345)
    at com.android.build.gradle.internal.transforms.DexTransform.transform(DexTransform.java:279)
    ... 81 more
Caused by: java.util.concurrent.ExecutionException: java.lang.RuntimeException: Translation has been interrupted
    at com.android.builder.core.DexByteCodeConverter.dexInProcess(DexByteCodeConverter.java:178)
    ... 85 more
Caused by: java.lang.RuntimeException: Translation has been interrupted
    at com.android.dx.command.dexer.Main.processAllFiles(Main.java:631)
    at com.android.dx.command.dexer.Main.runMultiDex(Main.java:376)
    at com.android.dx.command.dexer.Main.run(Main.java:290)
    at com.android.builder.internal.compiler.DexWrapper.run(DexWrapper.java:54)
    at com.android.builder.core.DexByteCodeConverter.lambda$dexInProcess$0(DexByteCodeConverter.java:174)
Caused by: java.lang.InterruptedException: Too many errors
    at com.android.dx.command.dexer.Main.processAllFiles(Main.java:623)
    ... 4 more