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updating a MySQL table with ID numbers based on another table.

Posted on 2009-07-12
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Last Modified: 2012-05-07
I have 2 tables, one called 'products' and one called 'sub_cats'

in the table products there is a column 'sub_cats' which instead of having ID numbers as one would expect, it has the full name of the sub category, found in the sub_cats table.

I need to get the ID number from the sub_cats table and put it in the right fields which corresponds to the right name in the sub_cats table as indicated in the code area below.

Cheers!!

Tim


so its like...
 
products table:
 
ID,  sub_cat, title
1    knife   SK 1
2    fork    SF 1
3    fork    SF 2
4    spoon   SP 1
etc...
 
 
and in the sub_cats table its simply:
 
ID,  sub_cat
1    knife
2    fork
3    spoon
 
 
so I really need the products table to be more like:
 
ID,  sub_cat, title
1    1        SK 1
2    2        SF 1
3    2        SF 2
4    3        SP 1

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Question by:timbo007
2 Comments
 
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by:
Guy Hengel [angelIII / a3] earned 250 total points
ID: 24834671
this should do:
update products , sub_cats 
  set products.sub_cat = sub_cats.id
where products.sub_cat = sub_cats.sub_cat

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Author Comment

by:timbo007
ID: 24834742
Hah, just as easy as that, I never thought of using join type syntax but it makes perfect sense!
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