mysql join with limit 1
Questions: Suppose I have two tables in one to many relationship. And, I want to select columns from each main record along with the first record from a related table. I tried some ways but it just do...
Mysql
MYSQLi error: User already has more than 'max_user_connections' active connections
January 31, 2018 Mysql Leave a comment
Questions: I have this error below on a site I am running. I don’t understand why is that as it works fine on my localhost. Is it something to do with the host? I am on an Unix server. Warning: ...
Python Pandas to_sql, how to create a table with a primary key?
January 31, 2018 Mysql Leave a comment
Questions: I would like to create a MySQL table with Pandas’ to_sql function which has a primary key (it is usually kind of good to have a primary key in a mysql table) as so: group_export.to_sq...
Import of 8GB mysql dump takes a long time
January 31, 2018 Mysql Leave a comment
Questions: I’ve got an 8GB MYSQL database dump of InnoDB tables created with mysqldump. I import the data with: mysql -uroot -p my_db < dump.sql An 5 GB dump of the DB was imported within an ...
Escaping the colon character ':' in JPA queries
January 31, 2018 Mysql Leave a comment
Questions: I’m trying to run a native query through JPA that uses a ‘:’ character. The particular instance is using a MySQL user variable in the query: SELECT foo, bar, baz, @rownum:...
Undo a mysql UPDATE command
January 31, 2018 Mysql Leave a comment
Questions: I was trying to do an update on the MySQL server and accidentally forgot to add an additional WHERE clause which was supposed to edit one row. I now have 3500+ rows edited due to my error. ...
How can I get the value of MySQL's 'ft_min_word_len' configuration variable using PHP?
January 31, 2018 Mysql Leave a comment
Questions: I know how to properly change the MySQL ft_min_word_len configuration variable, but what I can’t seem to easily find in the PHP & MySQL documentation (maybe I’m not using co...
How to use PHP string in mySQL LIKE query?
January 31, 2018 Mysql Leave a comment
Questions: I am trying to find the number of rows that match a specific pattern. In this example, all that START with “123”: This is working: $query = mysql_query("SELECT * FROM table WHER...
MySQL Join Same Table
January 31, 2018 Mysql Leave a comment
Questions: I have the table ‘meta_data’ with the following fields: id post_id meta_key meta_value I’d like to loop through and display a list of EACH post (post_id) that has an entry...
How to select from only one table in jOOQ using a query with a join?
January 31, 2018 Mysql Leave a comment
Questions: I have the following query in jOOQ: factory() .select() .from(PERSON) .join(ENDUSER).on(ENDUSER.PERSON_FK.equal(PERSON.ID)) .where(ENDUSER.ID.equal(userId)) .fetchOne(); This query returns ...