concatenation - MYSQL Concat not working -

-

update profile set favourties=concat(favourties,"123") id=1

i want append 123 in favourties if default value of favourties set null query not work. query if favourties set null , append 123 it

update profile set favourties=concat(ifnull(favourties, ''),"123") id=1

Comments

Post a Comment

Popular posts from this blog

mysql - How to insert just year and month into date field? -

-
i have column called table_date using now() insert current date ( 2011-02-23 ). know can manipulate sql/php show me year , monthname. however, want know if it's possible insert table_date current date year-month 2011-02 ? thanks a date field going full date, , far know, required specify full date. it might easiest use 01 , 2011-02-01 february 2011. obviously, can format output of date field liking when querying it: select date_format(fieldname,"%y-%m");
Read more

c# - Detect changes in ObjectSet in Entity Framework 4.0? -

-
i want check if there changes in table in ef 4.0 following code: var = context.users.gethashcode(); addnewuser(); context.savechanges(); var b = context.users.gethashcode(); a == b, don't know why? any helps appreciated! gethashcode has absolutelly different usage . can't detect changes in objectset because entry point related database table(s). can detect changes prepared in objectcontext before accept changes (default savechanges accept changes). changes objectcontext use: context.objectstatemanager.getobjectstateentries(...)
Read more