Hello Lengyel,
Once, Monday, October 30, 2000, 5:36:23 PM, you wrote:
LF> Hello everybody!
LF> I need some help with a simple query.
LF> I've got a problem with getting a maximum value from a very large table
LF> (10000000+ rows):
LF> I have table:
LF> CREATE TABLE TABLE_A
LF> (
LF> COL1 INT,
LF> COL2 INT,
LF> CONSTRAINT PK PRIMARY KEY (COL1, COL2)
LF> )
LF> and when I want to get the maximum value for col1:
LF> SELECT MAX(COL1) FROM TABLE_A WHERE COL2 = 1
LF> it takes a large amount of time.
LF> I created an index on column COL1, but it doesn't work.
You need to create index on COL2.
--
Best regards,Yury ICQ 11831432mailto:yura@vpcit.ru