SQL GROUP BY syntax and instance

SQL GROUP BY syntax and instance
GROUP BY statement
The GROUP BY statement is used to combine aggregate functions to group result sets based on one or more columns.

SQL GROUP BY syntax

Select column_name, aggregate_function (column_name)
From table_name
WHERE column_name operator value
GROUP BY column_name

To see a group by instance

Like the contents of the table.

GameID Best Top spam

111 1 1 1

121 1 1 0

123 0 1 1

111 1 0 1

I'm going to take out the best top spam The number result should be

GameID Best Top spam

111 2 1 2
121 1 1 0
123 0 1 1

select GameID, sum (best) as bestcnt, sum (top) as tocnt, sum (spam) as spamcnt
From table
GROUP BY GameID

Using methods in the PHP tutorial

$sql = "Select Gameid,sum (Best) as Best,sum (top) as top,sum (spam) as spam, from TableName Group by GameID ORDER by G Ameid ASC ";

Let's look at a simpler example.

Database Tutorial Tables Table
Date wins
2009-12-9 wins
2009-12-9 wins
2009-12-9 Negative
2009-12-9 Negative
2009-12-10 Negative
2009-12-10 wins
2009-12-10 Negative

Query results
Date wins
2009-12-9 2 2
2009-12-10 1 2

Select Date,
SUM (Decode (winner, ' win ', 1,0)),
SUM (Decode (winner, ' negative ', 1,0))
From database table
GROUP BY date