我是MYSQL的新手，无法在此论坛上解决甚至没有这么多答案，无法识别此声明中的错误。我正在使用MYSQL数据库。
我有2个表：Ratemaster和rate，其中客户可以拥有1种不同价格的产品。 因此，客户和产品字段重复，只有费率字段发生变化。 现在Table Ratemaster包含所有字段：id，客户代码，产品，费率，用户 而表费率只有：id，cust代码，Rate，user。 - user字段用于检查session_user。
现在，Table Ratemaster有3条记录，除了Rate字段为空外，所有字段值都相同。
表费率有不同的费率。
我想要从费率表中的Ratemaster更新所有费率。我无法使用UPDATE和LIMIT mysql命令执行此操作，它会给出错误：
UPDATE和LIMIT
的使用不正确
UPDATE Ratemaster, Rates
SET Ratemaster.Rate=Rates.Rate
WHERE Ratemaster.user=Rates.user
LIMIT 1
答案 0 :(得分：17)
通常您可以在LIMIT语句中使用ORDER和UPDATE，但在您的情况下不是，如MySQL Documentation 12.2.10. UPDATE Syntax中所述：
对于多表语法，UPDATE更新每个名为的表中的行 在table_references中满足条件。在这种情况下，ORDER 不能使用BY和LIMIT。
尝试以下方法：
UPDATE Ratemaster
SET Ratemaster.Rate =
(
SELECT Rates.Rate
FROM Rates
WHERE Ratemaster.user = Rates.user
ORDER BY Rates.id
LIMIT 1
)
答案 1 :(得分：7)
萨拉姆 您可以使用此方法并正常工作！
UPDATE Ratemaster, Rates
SET Ratemaster.Rate=Rates.Rate
WHERE Ratemaster.user=Rates.user
ORDER BY Rates.id
LIMIT 1
答案 2 :(得分：1)
阅读文章 How to use ORDER BY and LIMIT on multi-table updates in MySQL
对于多表语法，UPDATE更新每个名为的表中的行 在table_references中满足条件。在这种情况下，ORDER 不能使用BY和LIMIT。
答案 3 :(得分：1)
工作100％
Could not resolve compiler classpath. Check if Kotlin Gradle plugin repository is configured in root project 'my_app_production'.
FAILURE: Build failed with an exception.
* What went wrong:
Could not determine the dependencies of task ':compileDebugKotlin'.
> 1
* Try:
Run with --info or --debug option to get more log output. Run with --scan to get full insights.
* Exception is:
org.gradle.api.internal.tasks.TaskDependencyResolveException: Could not determine the dependencies of task ':compileDebugKotlin'.
at org.gradle.api.internal.tasks.CachingTaskDependencyResolveContext.getDependencies(CachingTaskDependencyResolveContext.java:66)
at org.gradle.execution.taskgraph.TaskDependencyResolver.resolveDependenciesFor(TaskDependencyResolver.java:46)
at org.gradle.execution.taskgraph.LocalTaskInfo.getDependencies(LocalTaskInfo.java:89)
at org.gradle.execution.taskgraph.LocalTaskInfo.resolveDependencies(LocalTaskInfo.java:62)
at org.gradle.execution.taskgraph.DefaultTaskExecutionPlan.addToTaskGraph(DefaultTaskExecutionPlan.java:168)
at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph.addTasks(DefaultTaskExecutionGraph.java:126)
at org.gradle.execution.TaskNameResolvingBuildConfigurationAction.configure(TaskNameResolvingBuildConfigurationAction.java:47)
at org.gradle.execution.DefaultBuildConfigurationActionExecuter.configure(DefaultBuildConfigurationActionExecuter.java:48)
at org.gradle.execution.DefaultBuildConfigurationActionExecuter.access$000(DefaultBuildConfigurationActionExecuter.java:25)
at org.gradle.execution.DefaultBuildConfigurationActionExecuter$1.proceed(DefaultBuildConfigurationActionExecuter.java:54)
at org.gradle.execution.DefaultTasksBuildExecutionAction.configure(DefaultTasksBuildExecutionAction.java:44)
at org.gradle.execution.DefaultBuildConfigurationActionExecuter.configure(DefaultBuildConfigurationActionExecuter.java:48)
at org.gradle.execution.DefaultBuildConfigurationActionExecuter.access$000(DefaultBuildConfigurationActionExecuter.java:25)
at org.gradle.execution.DefaultBuildConfigurationActionExecuter$1.proceed(DefaultBuildConfigurationActionExecuter.java:54)
at org.gradle.execution.ExcludedTaskFilteringBuildConfigurationAction.configure(ExcludedTaskFilteringBuildConfigurationAction.java:47)
at org.gradle.execution.DefaultBuildConfigurationActionExecuter.configure(DefaultBuildConfigurationActionExecuter.java:48)
at org.gradle.execution.DefaultBuildConfigurationActionExecuter.select(DefaultBuildConfigurationActionExecuter.java:36)
at org.gradle.initialization.DefaultGradleLauncher$CalculateTaskGraph.run(DefaultGradleLauncher.java:305)
at org.gradle.internal.operations.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:300)
at org.gradle.internal.operations.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:292)
at org.gradle.internal.operations.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:174)
at org.gradle.internal.operations.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:90)
at org.gradle.internal.operations.DelegatingBuildOperationExecutor.run(DelegatingBuildOperationExecutor.java:31)
at org.gradle.initialization.DefaultGradleLauncher.constructTaskGraph(DefaultGradleLauncher.java:190)
at org.gradle.initialization.DefaultGradleLauncher.doBuildStages(DefaultGradleLauncher.java:145)
at org.gradle.initialization.DefaultGradleLauncher.executeTasks(DefaultGradleLauncher.java:124)
at org.gradle.internal.invocation.GradleBuildController$1.call(GradleBuildController.java:77)
at org.gradle.internal.invocation.GradleBuildController$1.call(GradleBuildController.java:74)
at org.gradle.internal.work.DefaultWorkerLeaseService.withLocks(DefaultWorkerLeaseService.java:154)
at org.gradle.internal.work.StopShieldingWorkerLeaseService.withLocks(StopShieldingWorkerLeaseService.java:38)
at org.gradle.internal.invocation.GradleBuildController.doBuild(GradleBuildController.java:96)
at org.gradle.internal.invocation.GradleBuildController.run(GradleBuildController.java:74)
at org.gradle.tooling.internal.provider.ExecuteBuildActionRunner.run(ExecuteBuildActionRunner.java:28)
at org.gradle.launcher.exec.ChainingBuildActionRunner.run(ChainingBuildActionRunner.java:35)
at org.gradle.tooling.internal.provider.ValidatingBuildActionRunner.run(ValidatingBuildActionRunner.java:32)
at org.gradle.launcher.exec.RunAsBuildOperationBuildActionRunner$3.run(RunAsBuildOperationBuildActionRunner.java:50)
at org.gradle.internal.operations.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:300)
at org.gradle.internal.operations.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:292)
at org.gradle.internal.operations.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:174)
at org.gradle.internal.operations.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:90)
at org.gradle.internal.operations.DelegatingBuildOperationExecutor.run(DelegatingBuildOperationExecutor.java:31)
at org.gradle.launcher.exec.RunAsBuildOperationBuildActionRunner.run(RunAsBuildOperationBuildActionRunner.java:45)
at org.gradle.tooling.internal.provider.SubscribableBuildActionRunner.run(SubscribableBuildActionRunner.java:51)
at org.gradle.launcher.exec.InProcessBuildActionExecuter$1.transform(InProcessBuildActionExecuter.java:47)
at org.gradle.launcher.exec.InProcessBuildActionExecuter$1.transform(InProcessBuildActionExecuter.java:44)
at org.gradle.composite.internal.DefaultRootBuildState.run(DefaultRootBuildState.java:79)
at org.gradle.launcher.exec.InProcessBuildActionExecuter.execute(InProcessBuildActionExecuter.java:44)
at org.gradle.launcher.exec.InProcessBuildActionExecuter.execute(InProcessBuildActionExecuter.java:30)
at org.gradle.launcher.exec.BuildTreeScopeBuildActionExecuter.execute(BuildTreeScopeBuildActionExecuter.java:39)
at org.gradle.launcher.exec.BuildTreeScopeBuildActionExecuter.execute(BuildTreeScopeBuildActionExecuter.java:25)
at org.gradle.tooling.internal.provider.ContinuousBuildActionExecuter.execute(ContinuousBuildActionExecuter.java:80)
at org.gradle.tooling.internal.provider.ContinuousBuildActionExecuter.execute(ContinuousBuildActionExecuter.java:53)
at org.gradle.tooling.internal.provider.ServicesSetupBuildActionExecuter.execute(ServicesSetupBuildActionExecuter.java:62)
at org.gradle.tooling.internal.provider.ServicesSetupBuildActionExecuter.execute(ServicesSetupBuildActionExecuter.java:34)
at org.gradle.tooling.internal.provider.GradleThreadBuildActionExecuter.execute(GradleThreadBuildActionExecuter.java:36)
at org.gradle.tooling.internal.provider.GradleThreadBuildActionExecuter.execute(GradleThreadBuildActionExecuter.java:25)
at org.gradle.tooling.internal.provider.ParallelismConfigurationBuildActionExecuter.execute(ParallelismConfigurationBuildActionExecuter.java:43)
at org.gradle.tooling.internal.provider.ParallelismConfigurationBuildActionExecuter.execute(ParallelismConfigurationBuildActionExecuter.java:29)
at org.gradle.tooling.internal.provider.StartParamsValidatingActionExecuter.execute(StartParamsValidatingActionExecuter.java:59)
at org.gradle.tooling.internal.provider.StartParamsValidatingActionExecuter.execute(StartParamsValidatingActionExecuter.java:31)
at org.gradle.tooling.internal.provider.SessionFailureReportingActionExecuter.execute(SessionFailureReportingActionExecuter.java:59)
at org.gradle.tooling.internal.provider.SessionFailureReportingActionExecuter.execute(SessionFailureReportingActionExecuter.java:44)
at org.gradle.tooling.internal.provider.SetupLoggingActionExecuter.execute(SetupLoggingActionExecuter.java:46)
at org.gradle.tooling.internal.provider.SetupLoggingActionExecuter.execute(SetupLoggingActionExecuter.java:30)
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:122)
at org.gradle.launcher.daemon.server.exec.WatchForDisconnection.execute(WatchForDisconnection.java:37)
at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:122)
at org.gradle.launcher.daemon.server.exec.ResetDeprecationLogger.execute(ResetDeprecationLogger.java:26)
at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:122)
at org.gradle.launcher.daemon.server.exec.RequestStopIfSingleUsedDaemon.execute(RequestStopIfSingleUsedDaemon.java:34)
at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:122)
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:122)
at org.gradle.launcher.daemon.server.exec.LogAndCheckHealth.execute(LogAndCheckHealth.java:55)
at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:122)
at org.gradle.launcher.daemon.server.exec.LogToClient.doBuild(LogToClient.java:62)
at org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:36)
at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:122)
at org.gradle.launcher.daemon.server.exec.EstablishBuildEnvironment.doBuild(EstablishBuildEnvironment.java:81)
at org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:36)
at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:122)
at org.gradle.launcher.daemon.server.exec.StartBuildOrRespondWithBusy$1.run(StartBuildOrRespondWithBusy.java:50)
at org.gradle.launcher.daemon.server.DaemonStateCoordinator$1.run(DaemonStateCoordinator.java:295)
at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:63)
at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:46)
at org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:55)
Caused by: java.lang.ArrayIndexOutOfBoundsException: 1
at com.google.android.gms.dependencies.DependencyInspector.registerDependencies(DependencyInspector.java:118)
at com.google.android.gms.dependencies.DependencyInspector.afterResolve(DependencyInspector.java:173)
at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:35)
at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)
at org.gradle.internal.event.DefaultListenerManager$ListenerDetails.dispatch(DefaultListenerManager.java:370)
at org.gradle.internal.event.DefaultListenerManager$ListenerDetails.dispatch(DefaultListenerManager.java:352)
at org.gradle.internal.event.AbstractBroadcastDispatch.dispatch(AbstractBroadcastDispatch.java:58)
at org.gradle.internal.event.DefaultListenerManager$EventBroadcast$ListenerDispatch.dispatch(DefaultListenerManager.java:340)
at org.gradle.internal.event.DefaultListenerManager$EventBroadcast$ListenerDispatch.dispatch(DefaultListenerManager.java:327)
at org.gradle.internal.event.AbstractBroadcastDispatch.dispatch(AbstractBroadcastDispatch.java:42)
at org.gradle.internal.event.BroadcastDispatch$SingletonDispatch.dispatch(BroadcastDispatch.java:230)
at org.gradle.internal.event.BroadcastDispatch$SingletonDispatch.dispatch(BroadcastDispatch.java:149)
at org.gradle.internal.event.ListenerBroadcast.dispatch(ListenerBroadcast.java:140)
at org.gradle.internal.event.ListenerBroadcast.dispatch(ListenerBroadcast.java:37)
at org.gradle.internal.dispatch.ProxyDispatchAdapter$DispatchingInvocationHandler.invoke(ProxyDispatchAdapter.java:93)
at com.sun.proxy.$Proxy29.afterResolve(Unknown Source)
at org.gradle.api.internal.artifacts.configurations.DefaultConfiguration$5.run(DefaultConfiguration.java:542)
at org.gradle.internal.operations.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:300)
at org.gradle.internal.operations.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:292)
at org.gradle.internal.operations.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:174)
at org.gradle.internal.operations.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:90)
at org.gradle.internal.operations.DelegatingBuildOperationExecutor.run(DelegatingBuildOperationExecutor.java:31)
at org.gradle.api.internal.artifacts.configurations.DefaultConfiguration.resolveGraphIfRequired(DefaultConfiguration.java:524)
at org.gradle.api.internal.artifacts.configurations.DefaultConfiguration.resolveToStateOrLater(DefaultConfiguration.java:509)
at org.gradle.api.internal.artifacts.configurations.DefaultConfiguration.access$1800(DefaultConfiguration.java:123)
at org.gradle.api.internal.artifacts.configurations.DefaultConfiguration$ConfigurationFileCollection.getSelectedArtifacts(DefaultConfiguration.java:1037)
at org.gradle.api.internal.artifacts.configurations.DefaultConfiguration$ConfigurationFileCollection.getFiles(DefaultConfiguration.java:1025)
at org.gradle.api.internal.artifacts.configurations.DefaultConfiguration.getFiles(DefaultConfiguration.java:444)
at org.gradle.api.internal.artifacts.configurations.DefaultConfiguration_Decorated.getFiles(Unknown Source)
at org.gradle.api.internal.artifacts.configurations.DefaultConfiguration.resolve(DefaultConfiguration.java:434)
at org.jetbrains.kotlin.gradle.tasks.AbstractKotlinCompileTool.getComputedCompilerClasspath$kotlin_gradle_plugin(Tasks.kt:94)
at org.gradle.api.internal.tasks.properties.bean.AbstractNestedRuntimeBeanNode$DefaultPropertyValue$1$1.create(AbstractNestedRuntimeBeanNode.java:83)
at org.gradle.util.SingleMessageLogger.whileDisabled(SingleMessageLogger.java:313)
at org.gradle.api.internal.tasks.properties.bean.AbstractNestedRuntimeBeanNode$DefaultPropertyValue$1.get(AbstractNestedRuntimeBeanNode.java:80)
at com.google.common.base.Suppliers$MemoizingSupplier.get(Suppliers.java:125)
at org.gradle.api.internal.tasks.properties.bean.AbstractNestedRuntimeBeanNode$DefaultPropertyValue.getValue(AbstractNestedRuntimeBeanNode.java:138)
at org.gradle.api.internal.tasks.properties.bean.AbstractNestedRuntimeBeanNode$DefaultPropertyValue.call(AbstractNestedRuntimeBeanNode.java:144)
at org.gradle.util.GUtil.uncheckedCall(GUtil.java:459)
at org.gradle.api.internal.file.collections.BuildDependenciesOnlyFileCollectionResolveContext.add(BuildDependenciesOnlyFileCollectionResolveContext.java:76)
at org.gradle.api.internal.tasks.TaskPropertyFileCollection.visitContents(TaskPropertyFileCollection.java:53)
at org.gradle.api.internal.file.CompositeFileCollection.visitDependencies(CompositeFileCollection.java:187)
at org.gradle.api.internal.tasks.CachingTaskDependencyResolveContext$TaskGraphImpl.getNodeValues(CachingTaskDependencyResolveContext.java:96)
at org.gradle.internal.graph.CachingDirectedGraphWalker$GraphWithEmpyEdges.getNodeValues(CachingDirectedGraphWalker.java:211)
at org.gradle.internal.graph.CachingDirectedGraphWalker.doSearch(CachingDirectedGraphWalker.java:121)
at org.gradle.internal.graph.CachingDirectedGraphWalker.findValues(CachingDirectedGraphWalker.java:73)
at org.gradle.api.internal.tasks.CachingTaskDependencyResolveContext.getDependencies(CachingTaskDependencyResolveContext.java:64)
... 90 more
* Get more help at https://help.gradle.org
BUILD FAILED in 1s
答案 4 :(得分：-3)
问题是LIMIT只与SELECT语句一起使用，因为它限制了查询返回的行数。
来自：http://dev.mysql.com/doc/refman/5.5/en/select.html
LIMIT子句可用于约束返回的行数 SELECT语句。 LIMIT需要一个或两个数字参数，其中 必须都是非负整数常量，但有以下例外：
Within prepared statements, LIMIT parameters can be specified using ? placeholder markers. Within stored programs, LIMIT parameters can be specified using integer-valued routine parameters or local variables as of MySQL 5.5.6.使用两个参数，第一个参数指定的偏移量 第一行返回，第二行指定最大数量 要返回的行。初始行的偏移量为0（不是1）：
SELECT * FROM tbl LIMIT 5,10; ＃检索行6-15
从特定偏移量检索所有行直到结果的末尾 设置，您可以使用一些大数字作为第二个参数。这个 语句检索从第96行到最后一行的所有行：
SELECT * FROM tbl LIMIT 95,18446744073709551615;
使用一个参数，该值指定要返回的行数 从结果集的开头：
SELECT * FROM tbl LIMIT 5; ＃检索前5行
换句话说，LIMIT row_count相当于LIMIT 0，row_count。
对于预准备语句，您可以使用占位符。下列 语句将从tbl表中返回一行：
SET @ a = 1;从'SELECT * FROM tbl LIMIT'中预备STMT？执行STMT 使用@a;
以下语句将返回第二行至第六行 tbl table：
SET @ skip = 1; SET @ numrows = 5;从'SELECT * FROM tbl中预备STMT 限制？，？';使用@skip执行STMT，@ numrows;
为了与PostgreSQL兼容，MySQL也支持LIMIT row_count OFFSET偏移语法。
如果LIMIT出现在子查询中，并且也应用于外部 查询，最外面的LIMIT优先。例如， 以下语句产生两行，而不是一行：
（SELECT ... LIMIT 1）LIMIT 2;