转自：http://www.2cto.com/database/201308/236323.html
MySQL更新时Error Code:1093和Error Code:1175的解决办法 MySQLSQLError Code: 1093. You can't specify target table 'ws_product' for update in FROM clause这个是我们在使用update或者delete语句时，在where条件里面加入的子查询导致的。例如如下的update语句：
update table set type = 'static' where id in (
select id from ws_product where first_name ='superman'
);
修改上述语句为下面这样，该问题可以解决：
update ws_product set type = 'static' where id in (
select id form (
select id from ws_product where first_name ='superman'
) xx
);
Error Code: 1175. You are using safe update mode and you tried to update a table without a WHERE that uses a KEY column To disable safe mode, toggle the option in Preferences -> SQL Queries and reconnect.解决办法是在当前session下执行如下的语句
SET SQL_SAFE_UPDATES = 0;
然后再执行Update语句
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