MySQL is a free, open source Relational Database Management System (RDBMS) that uses Structured Query Language (SQL).
I am storing the last login time in MySQL in, datetime-type filed. When users logs in, I want to get …
mysqlI have a table table1 with three columns and a bunch of rows: [key_col|col_a|col_b] I …
mysql insert-updateI want to be able to select a bunch of rows from a table of e-mails and group them by …
mysql sql group-by sql-order-by aggregate-functionsI need to ALTER my existing database to add a column. Consequently I also want to update the UNIQUE field …
mysqlWhat difference does it make when I use float and decimal data types in MySQL?. When should I use which?
mysqlI want to update rows in my table with starting from 1001 to next 1000. I tried with following query: UPDATE `oltp_…
mysql limit sql-updateWhich way to count a number of rows should be faster in MySQL? This: SELECT COUNT(*) FROM ... WHERE ... Or, the …
mysql performanceI have a users table and a payments table, for each user, those of which have payments, may have multiple …
mysql sql select inner-joinIs there a difference between a schema and a database in MySQL? In SQL Server, a database is a higher …
mysql database schema database-schemaI read many threads about getting only the first row of a left join, but, for some reason, this does …
mysql join left-join groupwise-maximum