Answer by deeps for Auto-increment MySQL column field on update using a...
SET @ordering = 100000;UPDATE candidate SET regno = (@ordering := @ordering + 1) WHERE year = 2014 AND confirm = 1 AND e_stat = 1 ORDER BY centre_code, `name`;
View ArticleAnswer by nico gawenda for Auto-increment MySQL column field on update using...
Update a table while sub-selecting the same table is not possible: http://dev.mysql.com/doc/refman/5.6/en/update.html"Currently, you cannot update a table and select from the same table in a...
View ArticleAnswer by Gordon Linoff for Auto-increment MySQL column field on update using...
This might do what you want:update table set increment = (select cnt from (select count(*) as cnt from table t where field = 'value' and t.id <= table.id ) a ) where field = 'value';
View ArticleAuto-increment MySQL column field on update using a single query
Suppose I have this code:$ids = execute_query("SELECT id FROM table WHERE field = 'value' ORDER BY order_field");$query = "UPDATE table SET increment = CASE";for ($i = 0; $i <= sizeof($ids); $i++) {...
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