I have a web app which uses com.mysql.jdbc.Driver to connect to MySQL database. Here are jdbcMySQL.properties: I create database like this: And the problem is: if I make then I have in my table BUT, if I make: I have in my table: Answer MySQL is a bit crazy w.r.t. encodings, try: Furthermore there is one more possible error cause:
Tag: mysql
Find records which cross-reference each other
I want to extract all the rows from a database table, where the rows cross-reference each other. My table contains 2 rows: ref1 & ref2 Table example: In this case, I want my query to return only rows 01 and 03, because they cross-reference each other. Is this possible using a single query, or will I need to iterate the
Stackoverflow with Hibernate using sql IN (id, id, id, id..id)
I am getting the error below saying there was a stack overflow. This is happening because a SQL statement with IN (id, id, id…id) has a ton of parameters. Is there anyway to fix this? This is happening in my local environment with Eclipse. JPA Error Hibernate Query Answer In our Grails project (2.3.6) with Hibernate 4.3.1.Final, we never had
mySql database – ID auto_increment : what are the risks of it?
I´m kind of new to databases and I was hoping you could answer my question: I have a table with an ID that´s a primary key, not null and Auto increments. It´s data type is int, with a limit of 50 digits. this table will be receiving new rows constantly, so I was wondering if it´s dangerous to leave as
Calculate price of rental period
I am working on a project for which I need to calculate prices of holiday homes available in a selected rental period. I need some help with building a SQL query that combines the following tables and …
two foreign keys, how to map with laravel eloquent
I have two tables in MySQL, where the first one is called users and the second one is called games. The table structure is as follows. users id (primary) email password real_name games id (Primary)…
SQL syntax error. check corresponds to MYSQL server
I try to do a form which can insert data into database. After I insert a dummy data the is come out. You have an error in your SQL syntax; check the manual that corresponds to your MySQL server …
Counting related rows in a child table
I have been trying to do some queries and getting a count on related tables using eloquent. Tables: requests contact (belongs to requests) history (belongs to contact) As such X number of requests each have Y number of contacts which in term each have Z number of histories Using sql I can do something like this to get all the
Select adjacent rows in mysql – but when using alphabetical order of specific column, not numeric order of ID
I have a wordpress install with custom post types where I would like to find the ‘previous’ and ‘next’ custom post type object via mysql. I have read many questions/answers on SO regarding how to achieve this when using the ID. The issue is that a lot of these objects were input at different times, so their numeric ‘id’ order
Deleting duplicate entries in table depends on several columns
I want to delete all duplicate entries in my MySQL database. I found a lot of solutions in the web but in every case the query worked only when you are looking up for 1 column. In my case I need a query for more than 1 row which will be executed as far as possible – the table is