Top "Mysql" questions

MySQL is a free, open source Relational Database Management System (RDBMS) that uses Structured Query Language (SQL).

How to convert all tables from MyISAM into InnoDB?

I know I can issue an alter table individually to change the table storage from MyISAM to InnoDB. I am …

mysql sql innodb
Difference between VARCHAR and TEXT in MySQL

When we create a table in MySQL with a VARCHAR column, we have to set the length for it. But …

mysql text varchar
How to remove MySQL root password

I want to remove the password for user root in localhost. How can I do that? By mistake I have …

mysql mysql-error-1045
Select row with most recent date per user

I have a table ("lms_attendance") of users' check-in and out times that looks like this: id user time io (…

mysql sql greatest-n-per-group
MySQL maximum memory usage

I would like to know how it is possible to set an upper limit on the amount of memory MySQL …

mysql memory ram
SQL WHERE condition is not equal to?

Is it possible to negate a where clause? e.g. DELETE * FROM table WHERE id != 2;

mysql sql where-clause negate
Restoring MySQL database from physical files

Is it possible to restore a MySQL database from the physical database files. I have a directory that has the …

mysql backup restore
SQL keys, MUL vs PRI vs UNI

What is the difference between MUL, PRI and UNI in MySQL? I'm working on a MySQL query, using the command: …

mysql sql key
Illegal mix of collations (utf8_unicode_ci,IMPLICIT) and (utf8_general_ci,IMPLICIT) for operation '='

Error message on MySql: Illegal mix of collations (utf8_unicode_ci,IMPLICIT) and (utf8_general_ci,IMPLICIT) for operation '=…

mysql stored-procedures
Maximum number of records in a MySQL database table

What is the upper limit of records for MySQL database table. I'm wondering about autoincrement field. What would happen if …

mysql database limit database-table