Question

我有两个表：

用户[id，用户名]

评论[标题，内容，邮政编码，用户ID]

我的后端是nodejs ... 我如何查询所有评论但未获取ID，但结果中包含用户名？

Select * from comments where postid=1

在这种情况下，我将在结果中获取用户ID 我需要一个相对的数据库吗？

Answer 1

使用加入

Something went wrong with the encryption tool: Get Key failed: Given final block not properly padded
java.security.UnrecoverableKeyException: Get Key failed: Given final block not properly padded
    at sun.security.pkcs12.PKCS12KeyStore.engineGetKey(PKCS12KeyStore.java:410)
    at sun.security.provider.KeyStoreDelegator.engineGetKey(KeyStoreDelegator.java:96)
    at sun.security.provider.JavaKeyStore$DualFormatJKS.engineGetKey(JavaKeyStore.java:70)
    at java.security.KeyStore.getKey(KeyStore.java:1023)
    at com.google.wireless.android.vending.developer.signing.tools.extern.export.KeystoreHelper.extractPrivateKey(KeystoreHelper.java:56)
    at com.google.wireless.android.vending.developer.signing.tools.extern.export.KeystoreHelper.getPrivateKey(KeystoreHelper.java:35)
    at com.google.wireless.android.vending.developer.signing.tools.extern.export.ExportEncryptedPrivateKeyTool.run(ExportEncryptedPrivateKeyTool.java:98)
    at org.jetbrains.android.exportSignedPackage.ExportSignedPackageWizard$2.run(ExportSignedPackageWizard.java:241)
    at com.intellij.openapi.progress.impl.CoreProgressManager$TaskRunnable.run(CoreProgressManager.java:750)
    at com.intellij.openapi.progress.impl.CoreProgressManager.lambda$runProcess$1(CoreProgressManager.java:157)
    at com.intellij.openapi.progress.impl.CoreProgressManager.registerIndicatorAndRun(CoreProgressManager.java:580)
    at com.intellij.openapi.progress.impl.CoreProgressManager.executeProcessUnderProgress(CoreProgressManager.java:525)
    at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:85)
    at com.intellij.openapi.progress.impl.CoreProgressManager.runProcess(CoreProgressManager.java:144)
    at com.intellij.openapi.progress.impl.CoreProgressManager$4.run(CoreProgressManager.java:395)
    at com.intellij.openapi.application.impl.ApplicationImpl$1.run(ApplicationImpl.java:305)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)
Caused by: javax.crypto.BadPaddingException: Given final block not properly padded
    at com.sun.crypto.provider.CipherCore.doFinal(CipherCore.java:989)
    at com.sun.crypto.provider.CipherCore.doFinal(CipherCore.java:845)
    at com.sun.crypto.provider.PKCS12PBECipherCore.implDoFinal(PKCS12PBECipherCore.java:399)
    at com.sun.crypto.provider.PKCS12PBECipherCore$PBEWithSHA1AndDESede.engineDoFinal(PKCS12PBECipherCore.java:431)
    at javax.crypto.Cipher.doFinal(Cipher.java:2165)
    at sun.security.pkcs12.PKCS12KeyStore.engineGetKey(PKCS12KeyStore.java:348)
    ... 20 more
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SQL相对DB用户名

1 个答案: