Question

For example suppose I have a table TRADES as follows

DATE, PRICE, …

I wish to construct a table TRADING_DAYS as follows

MARKET, DATE

With sample data as follows

NYSE, 2011-03-03
NYSE, 2011-03-04
NYSE, 2011-03-05

Is it possible to write a query that extracts DATE from TRADES, combines it with the constant ‘NYSE’ and inserts into TRADING_DAYS?

Answer 1

INSERT INTO TRADING_DAYS 
SELECT 'NYSE', DATE
FROM TRADES

But I guess you want the distinct dates rather then duplicates?

INSERT INTO TRADING_DAYS 
SELECT DISTINCT 'NYSE', DATE
FROM TRADES