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Tag: mysql

Mapping one to one relationships in Spring Boot

I am trying to map a User with a certain Table in a one to one relationship. This here is my code, id appreciate if u take a look at it: User class: The Table class: Answer You don’t mapped parent entity with child entity properly.In parent table object of CTable is currenTable and you mapped by with table. Change:

org.h2.jdbc.JdbcSQLSyntaxErrorException h2 database java

Exception in thread “main” org.h2.jdbc.JdbcSQLSyntaxErrorException: Syntax error in SQL statement “INSERT INTO SMTP_DATA(SMTP_SERVER, SMTP_USERNAME, SMTP_PASSWORD, SMTP_FROM, SMTP_TO) VALUES (DEMO.STMP.COM, DEMOUSERNAME, DEMOPASSWORD, [email protected][*]MAIL.COM, [email protected]);”; expected “(, ., [, ::, AT, FORMAT, *, /, %, +, -, ||, ~, !~, NOT, LIKE, ILIKE, REGEXP, IS, IN, BETWEEN, AND, OR, ,, )”; SQL statement: I am kind new to h2 and sql statments

Communication link failure in mysql jdbc driver

I’am not able to establish connection with mysql from java using this code It’s throwing me this error The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server. The driver has not received any packets from the server. No appropriate protocol (protocol is disabled or cipher suites are

Db insertion row if not exist spring boot

I have a two instances of one spring boot microservice. If two requests are sent at the same time, and the second request can update the row that was created by the first request. How i can prevent this? For example the table contains this columns :id,format,username,groupName and if a row exists (3,”test”,”test”,”test”) and if we try to insert another