org.springframework.jdbc.BadSqlGrammarException: Error updating database
报错信息：
org.springframework.jdbc.BadSqlGrammarException:
Error updating database. Cause: java.sql.SQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ‘deletes from mybatis.user where id=5’ at line 1
分析：
您的 SQL 语法有误
You have an error in your SQL syntax
检查与您的MySQL服务器版本相对应的手册，了解在附近使用的正确语法 ‘deletes from mybatis.user where id=5’
check the manual that corresponds to your MySQL server version for the right syntax to use near ‘deletes from mybatis.user where id=5’ at line 1
根据标错信息得知SQL语句写错了，此时需要检查书写SQL的文件(userMapper.xml映射文件)，发现手误写错delete
