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this is pure code notes, check out mysql also


  • get Database size in kilobytes:
SELECT sum( data_length + index_length ) / 1024)  'DB Size in MB' FROM information_schema.TABLES WHERE TABLES.TABLE_SCHEMA='<database name>' GROUP BY table_schema

convert an INT field to BIN

SELECT CONV( int_field, 10, 2) FROM table;


  • SQL Error 10060 :
    • port filtered