insert data to table from another table

how can i insert data to table1 from table2?
table1 have relation with another tables and have primmary and foreign key ,so i have problem,
please help me.
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For each of your foreign keys you'll need to do:

insert into LookupTable
Select distinct (ForignKey) from Table2

then do your insert from table2.
as simon has indicated
you first need to insert the parent rows to the related tables...

and then you can do the insert into Table1 from table2

is this a one-off or a normal requirement ?

if its going to be part of your standard requirements and all the data is present
you may like to investigate BEFORE or INSTEAD OF TRIGGERS  
on the tables or a new view

z1357_khAuthor Commented:
please describe more,
table1 has relation with table3 and no relation with table2
fields in table1 and table2 is equal.
please indicate all commands
yah so you need in table3, say, the value Elephant before you can put it into table1 from table2.


Insert into table3 (ColumnName)
select distinct (t2.foreignKeyColumn)
from table2 t2 left join
      table3 t3
on t2.ForignKeyColumn = t3.ColumnName
where t3.ColumnName is null

do this for each relationship.


Insert into table1 (Col1, Col2, Col3)
select Col1, Col2, Col3 from table2

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