mysql - where is the fault in my sql code? -

'select * t1           join t2 on t1.wid = t2.wid           t2.wid null           limit ' . $number; 

this code nothing returns me why not take values back??

join t2 on t1.wid = t1.wid 

did mean that? or mean t1.wid = t2.wid? in case you'd want left join.

edit

okay, fixed it. won't show results unless there rows in t2 have wid matches row in t1 same wid.

if want results, change this:

'select * t1           left join t2 on t1.wid = t2.wid           t2.wid null           limit ' . $number; 

next edit

if goal update t2 values t1 aren't in t2, this:

'insert t2     select t1.* t1      left join t2          on t1.wid = t2.wid      t2.wid null      limit ' . $number; 

the missing step return t1's results, , insert them t2.