how can we deploy as flat jar

[chungchi300]

1. mvn package in root directory
2. java -jar admin/target/admin.jar

It gives me this,

2020-10-08 15:56:58.288 ERROR 23800 --- [           main] o.s.boot.SpringApplication               : Application run failed

org.hibernate.exception.SQLGrammarException: could not prepare statement
        at org.hibernate.exception.internal.SQLExceptionTypeDelegate.convert(SQLExceptionTypeDelegate.java:63) ~[hibernate-core-5.3.17.Final.jar!/:5.3.17.Final]
        at org.hibernate.exception.internal.StandardSQLExceptionConverter.convert(StandardSQLExceptionConverter.java:42) ~[hibernate-core-5.3.17.Final.jar!/:5.3.17.Final]
        at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:113) ~[hibernate-core-5.3.17.Final.jar!/:5.3.17.Final]
        at org.hibernate.engine.jdbc.internal.StatementPreparerImpl$StatementPreparationTemplate.prepareStatement(StatementPreparerImpl.java:186) ~[hibernate-core-5.3.17.Final.jar!/:5.3.17.Final]
        at org.hibernate.engine.jdbc.internal.StatementPreparerImpl.prepareQueryStatement(StatementPreparerImpl.java:151) ~[hibernate-core-5.3.17.Final.jar!/:5.3.17.Final]
        at org.hibernate.loader.Loader.prepareQueryStatement(Loader.java:2082) ~[hibernate-core-5.3.17.Final.jar!/:5.3.17.Final]
        at org.hibernate.loader.Loader.executeQueryStatement(Loader.java:2012) ~[hibernate-core-5.3.17.Final.jar!/:5.3.17.Final]
        at org.hibernate.loader.Loader.executeQueryStatement(Loader.java:1990) ~[hibernate-core-5.3.17.Final.jar!/:5.3.17.Final]
        at org.hibernate.loader.Loader.doQuery(Loader.java:949) ~[hibernate-core-5.3.17.Final.jar!/:5.3.17.Final]
        at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:351) ~[hibernate-core-5.3.17.Final.jar!/:5.3.17.Final]
        at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:321) ~[hibernate-core-5.3.17.Final.jar!/:5.3.17.Final]
        at org.hibernate.loader.Loader.loadCollectionBatch(Loader.java:2536) ~[hibernate-core-5.3.17.Final.jar!/:5.3.17.Final]
        at org.hibernate.loader.collection.plan.LegacyBatchingCollectionInitializerBuilder$LegacyBatchingCollectionInitializer.initialize(LegacyBatchingCollectionInitializerBuilder.java:83) ~[hibernate-core-5.3.17.Final.jar!/:5.3.17.Final]
        at org.hibernate.persister.collection.AbstractCollectionPersister.initialize(AbstractCollectionPersister.java:692) ~[hibernate-core