Re: date_sub, must use a datetime column type?

2002-10-28 Thread M Spreij
Hello List, Is it true that the date_sub function(s) will only work on datetime column types? SELECT count(id) as id FROM messages WHERE client_id = '2' AND datetime_col date_sub(NOW(),interval 1 day) To get the above query to work, I had to change my datetime_col column from timestamp to

Re: date_sub, must use a datetime column type?

2002-10-28 Thread M Spreij
Is it true that the date_sub function(s) will only work on datetime column types? SELECT count(id) as id FROM messages WHERE client_id = '2' AND datetime_col date_sub(NOW(),interval 1 day) To get the above query to work, I had to change my datetime_col column from timestamp to datetime, and

Re: MYSQL newbie :-)

2002-10-28 Thread M Spreij
This has probably been asked a thousand times before but only once from me. I am able to programme in MS Access to quite a high level to which I have now realised its limitations, where is the best place to start learning and reading up on MYSQL, I am not really a book reader as I prefer to do

re: Table-sizes, number of tables etc

2002-10-28 Thread M Spreij
At 13:36 +0200 28-10-2002, Victoria Reznichenko wrote: MdB 2) How many entries can one single table have? MdB (The absolute maximum) There are no limits on number of rows. What if the values for Primary Key run out? Can you use a unsigned bigint as Primary Key? I mean, we /have/ to store the

re: Table-sizes, number of tables etc

2002-10-28 Thread M Spreij
Monday, October 28, 2002, 2:00:28 PM, you wrote: MS At 13:36 +0200 28-10-2002, Victoria Reznichenko wrote: MdB 2) How many entries can one single table have? MdB (The absolute maximum) There are no limits on number of rows. MS What if the values for Primary Key run out? You get Duplicate key

ordered group by

2002-10-25 Thread M Spreij
1. When using GROUP BY it is not possible to order the rows before the grouping takes place, is that right? Like, if you're selecting books, grouping on author, and you want to show the first book of each author, you'd want to order by date and then group by author? 2. Other grouping