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Strict Standards: Declaration of Walker_Page::start_el() should be compatible with Walker::start_el($output) in /blog/wp-includes/classes.php on line 534

Strict Standards: Declaration of Walker_Page::end_el() should be compatible with Walker::end_el($output) in /blog/wp-includes/classes.php on line 534

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Strict Standards: Declaration of Walker_Category::end_lvl() should be compatible with Walker::end_lvl($output) in /blog/wp-includes/classes.php on line 649

Strict Standards: Declaration of Walker_Category::start_el() should be compatible with Walker::start_el($output) in /blog/wp-includes/classes.php on line 649

Strict Standards: Declaration of Walker_Category::end_el() should be compatible with Walker::end_el($output) in /blog/wp-includes/classes.php on line 649

Strict Standards: Declaration of Walker_CategoryDropdown::start_el() should be compatible with Walker::start_el($output) in /blog/wp-includes/classes.php on line 674

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[MYSQL] Jak pobrać z bazy danych losowe rekordy? » Porady MySQL » egrafik.pl
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Strict Standards: Resource ID#251 used as offset, casting to integer (251) in /forum2/db/mysql4.php on line 223

Strict Standards: Resource ID#251 used as offset, casting to integer (251) in /forum2/db/mysql4.php on line 224
[MYSQL] Jak pobrać z bazy danych losowe rekordy?
Porady MySQL | 5 maj 2008 | Wizyt: 111702

Strict Standards: Only variables should be assigned by reference in /blog/wp-includes/post.php on line 114

Strict Standards: Only variables should be assigned by reference in /blog/wp-includes/post.php on line 114

Strict Standards: Only variables should be assigned by reference in /blog/wp-includes/post.php on line 114

Strict Standards: Only variables should be assigned by reference in /blog/wp-includes/post.php on line 114

Strict Standards: Only variables should be assigned by reference in /blog/wp-includes/post.php on line 114

Strict Standards: Only variables should be assigned by reference in /blog/wp-includes/post.php on line 114

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Aby posortować rekordy z bazy danych w sposób losowy należy użyć bardzo prostego sposobu, a mianowicie wykorzystać wbudowaną w język MySql funkcję RAND().

Przykład:

Kod: mysql

SELECT * FROM przykladowa_tabela ORDER BY RAND() LIMIT 5

W przedstawionym przykładzie zapytaniem SELECT pobieramy zawartość  tabeli: przykładowa_tabela. Poleceniem ORDER BY RAND() pobieramy rekordy w losowej kolejności, natomiast poleceniem LIMIT określamy, że interesuje nas wylosowanie 5 rekordów. Proste:)

Opracowanie: Adam Suchowski

nowe Porady MySQL » zobacz wszystkie

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SELECT * FROM wp_comments WHERE comment_post_ID = '899' AND comment_approved = '1' ORDER BY comment_date desc

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