faster way to create variable that aggregates a column by id
7274
Calculate group mean (or other summary stats) and assign to original data
140337
Using an aggregate function in where
5136
How to sum a variable by group
40535
Sum over n variables
42491
How do I efficiently get "the most recent corresponding row"?
146677
Create several new derived variables from existing variables in data.frame
143916
Is it possible to refer to column names via bind variables in Oracle?
150733
Create an ID (row number) column
100742
Pivot rows to columns without aggregate
75971
Is there a PL/SQL pragma similar to DETERMINISTIC, but for the scope of one single SQL SELECT?
5208
Which is faster/best? SELECT * or SELECT column1, colum2, column3, etc
139728
Query speed based on order of columns
102054
Is there an Oracle SQL query that aggregates multiple rows into one row?
24120
Return a column per date in a range
45813
QUERY - pivot multiple columns, variable number of rows
38981
How can I prove that the following T-SQL is bad for performance?
149449
Better query to select multiple columns into a single output column?