newbie: select from a table, conditioned on the entry in another table
Hi I have 2 tables, say A and B. One field in table A, say A_link, points to a field B_link in table B. I need to select entries in A, which fulfill two conditions: A_cond1 = XX and B_cond2 = YY. E.g tabel A table B A_cond1 A_link B_link B_cond2 1 aa aa A 1 aa ac B 1 ac dd A 2 dd ef C 2 ef 3 aa 3 dd 3 dd 4 ac 4 ac 4 ef How can I now define a select statement such as: SELECT* from A WHERE A_cond1 BETWEEN 1 AND 3 and corresponding field B_cond2 = A this would return A_cond1 A_link 1 aa 1 aa 2 dd 3 dd 3 dd many thanks for your kind help best regards Christoph -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
newbie: how to sort a database without extracting the data
Hi I am really new to mysql. I need my database to be sorted according to one field. But since the database with 1200 records is huge, I don't want to do it using SELECT. What I need is just the stored database being sorted on hard-disk. Is there any way doing this like creating a new database and importing the old one but being sorted? many thanks for your kind help cheers christoph (p.s. I need this for later chunk-wise data-fetch with one chunk being homogenous in regard to one (the sorted) field) -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
Re: newbie: how to sort a database without extracting the data
thanks Damian but I don't understand this: My field according to which I want the database to be sorted IS an unique number. eg I have 1 ab 33 1 cd 21 1 ac 32 2 aa 22 2 cd 25 3 kw 03 3 ie 02 2 ei 05 2 wk 00 I need it in the form: 1 ab 33 1 cd 21 1 ac 32 2 aa 22 2 cd 25 2 ei 05 2 wk 00 3 kw 03 3 ie 02 what do you mean by adding an index thanks for your help cheers christoph Damian McMenamin wrote: add an index on the field. would be quickerthan any exporting importing. --- Christoph Lehmann [EMAIL PROTECTED] wrote: Hi I am really new to mysql. I need my database to be sorted according to one field. But since the database with 1200 records is huge, I don't want to do it using SELECT. What I need is just the stored database being sorted on hard-disk. Is there any way doing this like creating a new database and importing the old one but being sorted? many thanks for your kind help cheers christoph (p.s. I need this for later chunk-wise data-fetch with one chunk being homogenous in regard to one (the sorted) field) -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/[EMAIL PROTECTED] Yours Sincerely, Damian McMenamin Analyst Programmer Melbourne Australia Cell: (61)040-0064107 Email: [EMAIL PROTECTED] -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
newbie: delete row xy
Hi I now how to use delete together with a WHERE statement. But e.g. after some warnings revealed me certain rows being inconsisent, and I want to delete them- how can I do this? I just know that I want to delete e.g row 1433 (I have no special id) thanks for a hint cheers christoph -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
