If you are working on a big mysql query and want to get the mysql query as email when it finishes use the below trick. Go to mysql command:Set pager directive: mysql> pager mail -s “subject” emailme@domain.comPAGER set to ‘mail’ -s “subject” emailme@domain.com The trick uses pager directive to redirect the query output result to […]
MySQL provides a LIMIT clause that is used to specify the number of records to return. The LIMIT clause makes it easy to code multi page results or pagination with SQL, and is very useful on large tables. Assume we wish to select all records from 1 – 30 (inclusive) from a table called “Orders”. […]
To Get Data Base Size in MB and Free Space in MBSELECT table_schema “dbName”, sum( data_length + index_length ) / 1024 / 1024 “Data Base Size in MB”, sum( data_free )/ 1024 / 1024 “Free Space in MB”FROM information_schema.TABLESGROUP BY table_schema ; To Get Size in GB: SELECT sum(round(((data_length + index_length) / 1024 […]
