tsql - How to looping trough a Table, find a value and insert if exists? -

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i've 2 table: table id field1 ....

table b id field2 field3 ...

i loop through table b , if a record same id exits in table a, add value field2 , field3 in table a.

i don't know how in t-sql! can me ? thanks

using loop construction not necessary update, can solve in neater way using set operations. if understand question correctly want update table values table b. use query this:

update tablea   set tablea.field2 = tableb.field2, tablea.field3 = tableb.field3   tableb   tablea.id = tableb.id

you might wanna check in query see values in field 2 , 3 in table before replacing them.

(to test first results of query be, build select query update query above!)


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