原文：Could not open JPA EntityManager for transaction; nested exception is javax.persistence.PersistenceException: org.hibernate.exception.SQLGrammarException: Cannot open connection
Could not open JPA EntityManager for transaction nested exception is javax.persistence.PersistenceException: org.hibernate.exception.SQLGrammarException: Cannot open connection 檢查一下數據源配置，看你的異常應該是使用JTA ...
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nested exception is org.hibernate.exception.SQLGrammarException
root cause root cause ...
could not extract ResultSet; SQL [n/a]; nested exception is org.hibernate.exception.SQLGrammarException: could not extract ResultSet
錯誤原因是數據庫存的和實體類寫的不一致： 應該把30行轉換成deptid ，就能正常取值了 ...
javax.persistence.PersistenceException: org.hibernate.exception.GenericJDBCException: ResultSet is from UPDATE. No Data.
Java jpa調用存儲過程，拋出異常如下： 解決方式： 根據存儲過程執行的是查詢、保存或者修改調用不同的方式即可。 例如執行update修改命令，如下： 存儲過程如下： ...
Exception occurred during processing request: could not extract ResultSet; SQL [n/a]; nested exception is org.hibernate.exception.SQLGrammarException
is org.hibernate.exception.SQLGrammarException: could not extract ResultSet這個問題，也是找了老 ...
解決Exception：Could not open Hibernate Session for transaction; nested exception is java.lang.NoClassDefFoundError: org/hibernate/engine/transaction
="org.springframework.orm.hibernate5.HibernateTransactionMa ...
spring boot配置spring-data-jpa的時候報錯CannotCreateTransactionException: Could not open JPA EntityManager for transaction; nested exception
初始以為是自己的配置問題，檢查后發現無錯誤 分析后可能是jar包沖突 將spring-orm的jar包升為高版本問題解決 ...
Caused by: org.hibernate.exception.SQLGrammarException: could not extract ResultSet
一般是字段映射或者JPA的配置問題，認真檢查實體或者父類有哪些字段和數據庫沒有映射到；參考文檔：https://www.cnblogs.com/qingmuchuanqi48/p/11986685.html ...