将记录从一个 Oracle SQL 表复制到另一个具有额外列的表

Question

This is part of a larger Java program, but I'm looking for a way in Oracle SQL to copy a record from one table to another. The original table is 45 columns. The second table is an archive table of the original table.

EDIT - It has the same 45 columns, but also has a NewKey column - created in the archive table using

("NEWKEY" NUMBER GENERATED ALWAYS as IDENTITY(START with 1 INCREMENT by 1)

and an archive_date column

"ARCHIVEDATE" DATE DEFAULT CURRENT_TIMESTAMP

Is there a way to do a query a la

INSERT INTO Archive_Table A
SELECT * (plus NEWKEY, ARCHIVEDATE) FROM Original Table O
WHERE O.CUSTKEY = passed_param;

where the only parameter passed is the CUSTKEY? Once a record is copied from the original table, it will then be deleted from the original table.

Answer 1

ARCHIVEDATE is a date field, so it should default to SYSDATE, not CURRENT_TIMESTAMP. This eliminates a conversion for every insert.

As others have said, just list out the columns:

insert into archivetable (custkey, cola, colb, colc) 
select custkey, cola, colb, colc 
  from originaltable 
 where custkey = passedparam;

There is no need to include NEWKEY or ARCHIVEDATE as they will be initialized on the insert.

Answer 2

If you started typing those 45 columns half an hour ago (when you posted the question), your code would have already be up and running.

Anyway: using an asterisk ( * ) in select is probably not the best idea; for what? What benefit do you expect? To save some keyboard strokes? Because, if you explicitly name all columns, you exactly know which value goes into which column. What if a new column is added into one of those two tables? insert into select * won't work any longer.

What you ask can be done using some dynamic SQL (so, within PL/SQL) by querying user_tab_columns , composing the insert into statement, paying attention to differences (identity and timestamp columns). Once you're done with coding and testing, as I said - a straightforward naming all those columns would be finished ages ago.

If I were you, I'd do exactly that: name all 45 columns.