On the list I see on a regular base sql-queries with something like this: - CAST(SUM(BYTES/1024/1024) or - substr(cast(min(start_time) as char(26)),1,19) as "DATETIME or - cast(substr(cast(max(end_time)-min(start_time) as char(20)),3,8) as char(8)) as "Length
The basic sql I understand now, but I want to know more about 'substr' and 'cast' and so on. Is there some-one who can give me the title of a book where this is explained or maybe an url or something?
Thanks in advance,
Brian.
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