How to insert records extracted from another table into one table

Question

I'm trying to write a query that extracts and transforms data from a table and then inserts that data into another table. Yes, this is a data warehouse query and I executed it in MS Access. So basically I want some query like this:

INSERT INTO Table2(LongIntColumn2, CurrencyColumn2) VALUES
  (SELECT LongIntColumn1, Avg(CurrencyColumn) as CurrencyColumn1 FROM Table1 GROUP BY LongIntColumn1);

I tried it but got a syntax error message.

If you wanted to do this, what would you do?

Answer 1

You have two syntax options:

Option 1

CREATE TABLE Table1 (
    id int identity(1, 1) not null,
    LongIntColumn1 int,
    CurrencyColumn money
)

CREATE TABLE Table2 (
    id int identity(1, 1) not null,
    LongIntColumn2 int,
    CurrencyColumn2 money
)

INSERT INTO Table1 VALUES(12, 12.00)
INSERT INTO Table1 VALUES(11, 13.00)

INSERT INTO Table2
SELECT LongIntColumn1, Avg(CurrencyColumn) as CurrencyColumn1 FROM Table1 GROUP BY LongIntColumn1

Option 2

CREATE TABLE Table1 (
    id int identity(1, 1) not null,
    LongIntColumn1 int,
    CurrencyColumn money
)

INSERT INTO Table1 VALUES(12, 12.00)
INSERT INTO Table1 VALUES(11, 13.00)


SELECT LongIntColumn1, Avg(CurrencyColumn) as CurrencyColumn1
INTO Table2
FROM Table1
GROUP BY LongIntColumn1

Remember that option 2 will create a table containing only the columns on the projection (the columns on the SELECT).

Answer 2

No "VALUES", no brackets:

INSERT INTO Table2(LongIntColumn2, CurrencyColumn2)
SELECT LongIntColumn1, Avg(CurrencyColumn) as CurrencyColumn1 FROM Table1 GROUP BY LongIntColumn1;