0
votes
1answer
565 views

SQL Limit + count group?

I'm tracking all the visitors of my site using this table: Visitors table In my admin panel, I have an overview of which countries visited my site, where they came from, ..., but because over 20+ ...
0
votes
1answer
54 views

MySQL limits on huge number return zero rows

I have table about 1,000,000 rows. this query work well: SELECT * FROM `articles` WHERE `articles`.`hash` NOT IN ( '1z8y' ) LIMIT 2000,10 But this query return zero rows: SELECT * FROM `articles` ...
2
votes
2answers
183 views

Why does adding LIMIT to my query make it crawl?

Simple query: select sum(score) total,name,gender,dob,country from users join scores on users.id = scores.user_id where date between '2012-01-01' and '2012-01-31 23:59:59' group by scores.user_id ...
0
votes
2answers
485 views

limit and then group by in MySQL

I have a mysql table having following structure : payment_id(int auto_increment), emp_id(int), chargeTime(datetime), payment(double) I need to have three latest (with respect to chargeTime) ...
5
votes
6answers
4k views

Too many columns in MySQL

I have a table with 1699 columns and when I'm trying to insert more columns I get the too many columns in the table error. In this table I have only 1000 rows. For me the most important thing is the ...