SELECT col1,
ROW_NUMBER( ) OVER (PARTITION BY
col1 ORDER BY col1
NULLS LAST) SRLNO
FROM table;
Replace col1 with 'column name'
and
table with 'table name'
Domanda
Is it possible to populate a column in SQL that looks like this? Original column on the left, the one I want on the right.
A...1
B...1
C...1
D...1
A...2
C...2
E...1
A...3
D...2
i.e. the first occurrence of each letter is 1, the second occurrence of each letter (going down) is a 2, the third occurrence of each letter is a 3 etc.
Soluzione
SELECT col1,
ROW_NUMBER( ) OVER (PARTITION BY
col1 ORDER BY col1
NULLS LAST) SRLNO
FROM table;
Replace col1 with 'column name'
and
table with 'table name'