Question

Suppose I have a table with 2 columns (status and date) like the following:

status: U  T  U  U  L       
date:   12 14 15 16 17

Can I (using only 1 SQL statement) count the number of distinct values in the status? That is:

• count(U)=3
• count(T)=1
• count(L)=2
• count(P)=0

Can I do this with 1 SQL query?

Note: I have static values in status. I can only have (U-T-L-P)

Answer 1

This will return a row for every status and the count in the second column:

SELECT Status, COUNT(*) Cnt
FROM Tbl
GROUP BY Status

So it would return

Status  Cnt
 U       3
 T       1
 L       1

for your example (in no defined order). Use ORDER BY if you want to sort the results.