I’ve recently started learning to use myBatis.I am now facing such a scenario, I need to constantly fetch a new list of Objects through WebService, then for this list, I need to insert/update each object into the oracle DB table through myBatis. The tricky part is, I cannot simply do a batch insert ever…
Tag: sql
JOOQ pojos with one-to-many and many-to-many relations
I am struggling to understand how to handle pojos with one-to-many and many-to-many relationships with JOOQ. I store locations that are created by players (one-to-many relation). A location can hold multiple additional players who may visit it (many-to-many). The database layout comes down to the following: W…
Query creation in Spring Data – dynamic where clause
Is there a way in Spring data to dynamically form the where clause? What I want to do is have a method (which is like the findBy / get method) which runs a WHERE and AND using the mentioned properties which are NOT NULL. For example, Our method looks something like this Thanks. Answer Take a look at JPA Speci…
JDBC ResultSet: I need a getDateTime, but there is only getDate and getTimeStamp
I would like to get the DATETIME column from an Oracle DB Table with JDBC. Here is my code: I have to identify the column type first. The field I am interested in is recognized as a Types.DATE, but it is really a DATETIME in the DB since it has this format: “07.05.2009 13:49:32” getDate truncates …
Incorporate a timeout option when user click the upper right “x” on the window versus a button.
I built a Swing application that works with an MSAccess database. I have various buttons to click when clicked–they will disconnect and unlock the database. Sadly, this is only in a perfect world where users will actually use those buttons and not the little red “x” on the upper right. When …
Reading data from mysql database using java
Firstly, I’m reading the product name and number of products from user using jTextFields. For that product I read the product id and price from database using sql query. But in the below code I display the product price in a jtextField but while running tha file I get query executed successfully but I&#…
what is the use of annotations @Id and @GeneratedValue(strategy = GenerationType.IDENTITY)? Why the generationtype is identity?
Why we are using this annotations? i need to know if this autoincrement my table id values. (GenerationType.IDENTITY) is there any other types whats actually happening when we use this annotation *Is it necessary to extend Domain abstract class?What is the use? Answer First of all, using annotations as our co…
Invalid operation for read only resultset: updateString
Following is my code(Re-constructed) which select & update STATUS field depending upon the conditions. (Using Servlets, Oracle as Backend and JDBC driver) I am getting the error while updating: Any suggestions will be appreciated. Update 1: The same code was working when select statement was selecting dat…
Getting id after insert within a transaction (Oracle)
Let’s say I have three tables: team, player, team_player. Table team_player is a bridge table allowing a “many to many” relationship. When someone wants to create a new team, they specify the initial players on that team. How do I insert both the team and team_player rows in the same transac…
How to use named parameter in plain sql with jooq
I’m using JOOQ with plain/raw SQL, so that means i’m not using any code generation or the fluid DSL thingy. The following code works: Now let’s say i have a query with multiple parameters like this: How do i use a named parameter with these types of queries? I’m thinking something like…