USE After DROP And CREATE (script In Query Browser)
I'm writing a simple script that creates the database and tables:
------------------------------------
DROP DATABASE IF EXISTS mydb;
CREATE DATABASE mydb CHARACTER SET utf8 COLLATE utf8_unicode_ci;
/*workaround: use mysql; */
use mydb;
DROP TABLE IF EXISTS movie;
CREATE TABLE movie (
id int not null auto_increment primary key
);
------------------------------------
When executing, Query Browser says "No database selected (1046)" on lines with table names. I add USE <dbname> after its creation, but it only works if the previous default database is different. A work-around is to add "USE mysql" just before the real USE, but it's ugly.
Any solutions?
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I am having trouble creating this. I have a table of categories. A category is either a regular category named or it is a sub-category and the parent category is linked by 'category_id'. These are all in one table, I did not create a seperate table for sub categories. How would I do this? Select from the database `categories` grouping them by first the main category and then all the other categories under it by 'parent_id'? This is my current query but it is not working: SELECT * FROM categories GROUP BY category_id, parent_id
Create Single Query From Queries On Two Tables (was "Help With Query...")
I read from other thread that query inside loop is not good idea. May I ask some help how can I create a single query to the following code which I use loop. $sql = "SELECT * FROM mytable order by points desc limit 10"; $rec = mysql_query($sql) or die(mysql_error()); $datas = mysql_fetch_array($rec); do{ $sq = "Select * from secondtable where linkid = '$datas[id]'"; $rst = mysql_query($sq) or die(mysql_error()); $rows = mysql_fetch_array($rst); echo "$rows[somefield]"; }while($datas= mysql_fetch_array($rec)); This works perfectly but I want the second query to be out of the loop if there is a way and how.
Create A Query Starting From A Value
I would like to know how to create a query which will return a certain number of rows from a database, starting from a particular key value. Something like SELECT * FROM users STARTING FROM id=7 ORDER BY name LIMIT 5 Does something that does this exist? I can't use WHERE id>7 because I am sorting on a different field and so the id field is unsorted.
Create General Query Log
I am trying to turn on General logging on mysql server [on a RHE linux box]. If I go >mysqld -l filename on shell, it says "command not found". What is the best way to create General log on a live server. Somehow MYSQL server doesn't have a my.cnf file. I have searched all over but there are no signs. Whenever I have to start/stop/restart the server, I use the ready-made mysql script.
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