Oracle Conditional Insert Statement
I would like to insert data from one table to another with some conditions.
Think that we have table-A(a,b,c) and table-B(x,y,z). I will do "insert into Table-A select x,y,z from Table_B" but with the conditions: if x='Sigma' the y will be x (the inserted value will be same as field x), if x='Teta' the y will be character value 'Beta' while inserting.
Best Regards
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INSERT INTO tablea(a, b, c)
SELECT x, CASE x WHEN 'Sigma' THEN x WHEN 'Teta' THEN 'Beta' END, z
FROM tableb;
You didn't specify what should happen if x is NOT either Sigma nor Teta.
The query above would return NULL for those values.
If the CASE should default to "y" in that scenario then try this instead
INSERT INTO tablea(a, b, c)
SELECT x,
CASE x WHEN 'Sigma' THEN x
WHEN 'Teta' THEN 'Beta'
ELSE y
END,
z
FROM tableb;
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something like:
insert into tableA(a,b,c) select x, case x when 'Sigma' then y when 'Teta' then 'Invalid', x from tableB;