mysql update or insert code example

Example 1: mysql insert on dupèlicate

INSERT INTO table_name(c1)
VALUES(c1)
ON DUPLICATE KEY UPDATE c1 = VALUES(c1) + 1;

Example 2: mysql update add to existing value

mysql> UPDATE tableName SET sometotal = sometotal+10 WHERE Id = 4;

Example 3: mysql insert exists update

INSERT INTO table (column_list)
VALUES (value_list)
ON DUPLICATE KEY UPDATE
   c1 = v1, 
   c2 = v2,
   ...;

Example 4: update having mysql

UPDATE contacts_domains cd, 
 (SELECT id FROM contacts_domains GROUP BY domain_id
   HAVING COUNT(contact_id) = 1) AS cdtmp
SET cd.dominant = 1
WHERE cd.id = cdtmp.id

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