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In this howto i will describe how to import large mysql dump files without PHPMyAdmin and Shell Access. I am writing this howto because my hosting company (well most of them) wont allow to import very large files using MySQL dump files. Like Godaddy.com limit you to import only 2MB file using PHPMyAdmin.
Is it possible to use an IF clause within a WHERE clause in MS SQL?
select a.title, group_concat(c.name SEPARATOR ' & ') as name
from album a
join albumartist b on b.albumid=a.albumid
join artist c on c.artistid=b.artistid
group by a.title;
from album a
join albumartist b on b.albumid=a.albumid
join artist c on c.artistid=b.artistid
group by a.title;
PHP Founder : Rasmus Lerdorf, University of Waterloo
MySQL Founder : Michael Widenius
JQuery Founder : John Resig
MySQL Founder : Michael Widenius
JQuery Founder : John Resig
how to count distinct elements, MySQL- Database Help. Visit Codewalkers to discuss how to count distinct elements, MySQL
RE: how to count distinct elements, MySQL
brut's query should work, but there's more in there than you need (DISTINCT + GROUP BY is a little redundant). This is simplier:
Code:
SELECT category, COUNT(*) AS cat_num FROM tablename GROUP BY category
RE: how to count distinct elements, MySQL
brut's query should work, but there's more in there than you need (DISTINCT + GROUP BY is a little redundant). This is simplier:
Code:
SELECT category, COUNT(*) AS cat_num FROM tablename GROUP BY category
SELECT COUNT(DISTINCT column_name) FROM table_name
DISTINCT combined with ORDER BY needs a temporary table in many cases.
Because DISTINCT may use GROUP BY, you should be aware of how MySQL works with columns in ORDER BY or HAVING clauses that are not part of the selected columns. See Section 11.11.3, “GROUP BY and HAVING with Hidden Columns”.
Because DISTINCT may use GROUP BY, you should be aware of how MySQL works with columns in ORDER BY or HAVING clauses that are not part of the selected columns. See Section 11.11.3, “GROUP BY and HAVING with Hidden Columns”.
In MySQL, CROSS JOIN is a syntactic equivalent to INNER JOIN (they can replace each other). In standard SQL, they are not equivalent. INNER JOIN is used with an ON clause, CROSS JOIN is used otherwise.
UNION is used to combine the result from multiple SELECT statements into a single result set.
If you have a single table with fields from other tables you can join them all fairly simply. Consider the following four tables: cars carid cartypeid carcolorid carmodelid carmodel carmodelid model carcolor carcolorid color cartype cartypeid type You can get the data from all the tables with a join: (i'm using the older syntax cause it is easier, the letters are aliases) select a.carid, b.model, c.color, d.type from cars a, carmodel b, carcolor c, cartype d where ... more>
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