WordPress database error: [Got error 28 from storage engine]
SHOW COLUMNS FROM wp_petition_signatures LIKE 'fields'

WordPress database error: [Duplicate column name 'fields']
ALTER TABLE wp_petition_signatures ADD `fields` TEXT;

WordPress database error: [Got error 28 from storage engine]
SHOW COLUMNS FROM wp_petition_fields LIKE 'ts'

WordPress database error: [Duplicate column name 'ts']
ALTER TABLE wp_petition_fields ADD `ts` TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP;

WordPress database error: [Got error 28 from storage engine]
SHOW COLUMNS FROM wp_petition_fields LIKE 'hide'

WordPress database error: [Duplicate column name 'hide']
ALTER TABLE wp_petition_fields ADD `hide` TINYINT(1);

WordPress database error: [Got error 28 from storage engine]
SHOW COLUMNS FROM wp_petition_signatures LIKE 'keep_private'

WordPress database error: [Duplicate column name 'keep_private']
ALTER TABLE wp_petition_signatures ADD `keep_private` enum('on','off') NOT NULL default 'off';

WordPress database error: [Got error 28 from storage engine]
SELECT SQL_CALC_FOUND_ROWS wp_posts.* FROM wp_posts INNER JOIN wp_term_relationships ON (wp_posts.ID = wp_term_relationships.object_id) INNER JOIN wp_term_taxonomy ON (wp_term_relationships.term_taxonomy_id = wp_term_taxonomy.term_taxonomy_id) WHERE 1=1 AND wp_term_taxonomy.taxonomy = 'category' AND wp_term_taxonomy.term_id IN ('4', '40', '38', '39') AND wp_posts.post_type = 'post' AND (wp_posts.post_status = 'publish') GROUP BY wp_posts.ID ORDER BY wp_posts.post_date DESC LIMIT 6, 6

Tutorials - Canvas Demos

WordPress database error: [Got error 28 from storage engine]
SELECT SQL_CALC_FOUND_ROWS wp_posts.* FROM wp_posts INNER JOIN wp_term_relationships ON (wp_posts.ID = wp_term_relationships.object_id) INNER JOIN wp_term_taxonomy ON (wp_term_relationships.term_taxonomy_id = wp_term_taxonomy.term_taxonomy_id) WHERE 1=1 AND wp_term_taxonomy.taxonomy = 'category' AND wp_term_taxonomy.term_id IN ('4', '40', '38', '39') AND wp_posts.post_type = 'post' AND (wp_posts.post_status = 'publish') GROUP BY wp_posts.ID ORDER BY wp_posts.post_date desc LIMIT 20, 20

Canvas Tutorials

Tutorials explain how to use the HTML canvas element in order to achieve a certain effect. Tutorials are grouped in to 3 skill levels: Beginner, Intermediate and Advanced.

Getting started?

We recommend the following tutorials:

Top ten tutorials

    WordPress database error: [Got error 28 from storage engine]
    SELECT DISTINCT wp_posts.*, (t1.meta_value+0.00) AS ratings_average, (t2.meta_value+0.00) AS ratings_users, (t3.meta_value+0.00) AS ratings_score FROM wp_posts LEFT JOIN wp_postmeta AS t1 ON t1.post_id = wp_posts.ID LEFT JOIN wp_postmeta AS t2 ON t1.post_id = t2.post_id LEFT JOIN wp_postmeta AS t3 ON t3.post_id = wp_posts.ID INNER JOIN wp_term_relationships ON (wp_posts.ID = wp_term_relationships.object_id) INNER JOIN wp_term_taxonomy ON (wp_term_relationships.term_taxonomy_id = wp_term_taxonomy.term_taxonomy_id) WHERE t1.meta_key = 'ratings_average' AND t2.meta_key = 'ratings_users' AND t3.meta_key = 'ratings_score' AND wp_posts.post_password = '' AND wp_posts.post_date < '2014-10-25 07:16:00' AND wp_posts.post_status = 'publish' AND wp_term_taxonomy.taxonomy = 'category' AND wp_term_taxonomy.term_id = 4 AND t2.meta_value >= 1 AND wp_posts.post_type = 'post' ORDER BY ratings_average DESC, ratings_users DESC LIMIT 10

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