I’m working on a website in a Spring Bootwhich is connected to a MySQL db. In the db i have two tables: Player and Match and i created a query that should return me a list of players with count of matches they already played. The problem is that typed aggregate function count(M) doesn’t and I don&…
Tag: sql
jooq query for sql query with analytical function
i have sql query like i need to write in jOOQ, any help. I tried the below Also,is there any way to avoid listing all columns in select. Instead of Something like Answer A derived table can be constructed like this: Also, is there any way to avoid listing all columns in select You’re looking for Table.a…
Parameter index out of range (1 > number of parameters, which is 0) When trying to read SQL Table
So I am trying to get some data out of my SQL Table with this servlet and output it in a JSP file. I found some articles with similar problems to mine but none of them helped in my case. I Hoped someone here can help me. I have to do this Project for one of my classes. I am
SELECT inside an UPDATE query
I’m trying to select a inner table while running an update, but I keep receiving an syntax error can anyone see what I’m doing wrong Thanks. Answer You need to write your SELECT as an assignment from a subquery (enclosed in parentheses), and also specify the table you are selecting the value from:
ORA-00905: missing keyword in case statement
I am getting ORA-00905: missing keyword in case statement in my when clause. Below is the query. Answer You can’t have a boolean value as a selectable something in a query in oracle, you can only make boolean expressions in e.g. the WHERE/ON clauses etc i.e. this is invalid: This is valid: You could lat…
JPA @OnetoOne self reference relationship with both columns non null
I have an existing database table For e.g. T_STUDENTS on top of which I have to create a JPA entity. All three columns in the table are NON NULL and the table has a self-reference as mentor_id Each student has a mentor who is also a student. There is a strict OneToOne relationship between the student and the …
SQLException: Column not found
My sql query should take all the fields from the table and transfer them to the FTL page using the UserMapper template. The template indicates which object to create and to which fields of the object which table columns to match. In summary: all the fields work correctly, but the seanceNumber field gives the …
Transform SQL to Hibernate criteria
I am writing a method for retrieving clients with sum of their orders (order.total) higher and less than input values. All its okay, but, sometimes i am get an error: How can i correcting this method, or, maybe, convert this in full criteria style? Answer In the end, i solved this problem by this way, using s…
“NoClassDefFoundError: javax/xml/bind/DatatypeConverter” with SQL Server JDBC
I recently switched to intellij but I’m finding it hard to connect to my localDB. The same code worked on eclipse fine. Also I have already added the sqljdbc42.jar as a module dependency. Error produced: Any help would be greatly appreciated. I’ve also tried the overloaded DriverManager.getConnect…
Query id return type
I use spring data. I want to get some contracts from DB. So I create two queries. In first I get contracts id that I need, in second I get contract by this id. First query in Repository.class ServiceJPA.class But in last line above I have an error. java.lang.IllegalArgumentException: Parameter value element […