Mysql “select * from” doesn't return all rows

Question

I\'m used to PostgreSQL and don\'t understand this behaviour on MySQL.

This table (from SugarCRM) has 3057 rows:

mysql> SELECT  count(*) FROM task         


        

Answer 1

Generally MyISAM table format is very reliable but tables can sometime get corrupted for various reasons like Hardware failures, mysqld process is killed while a write operation is underway, untimely shutdowns or bugs in the MySQL or MyISAM code. If you're using a very old version then bugs are likely.

Before repairing it is recommended that you backup. To repair

REPAIR [NO_WRITE_TO_BINLOG | LOCAL] TABLE
tbl_name [, tbl_name] ...
[QUICK] [EXTENDED] [USE_FRM]