| SUBSTRING |
SUBSTRING('ABCD', 2, 2) → 'BC' |
SUBSTR('ABCD', 2, 2) → 'BC' |
SUBSTRING('ABCD', 2, 2) → 'BC' |
| LENGTH |
LEN('ABCD') → 4 |
LENGTH('ABCD') → 4 |
LENGTH('ABCD') → 4 |
| Aktualna data |
GETDATE() |
SYSDATE |
NOW() lub CURRENT_TIMESTAMP |
| Dodawanie dni |
DATEADD(DAY, 5, GETDATE()) |
SYSDATE + 5 |
NOW() + INTERVAL '5 DAY' |
| Różnica między datami |
DATEDIFF(DAY, '2023-01-01', '2023-01-10') → 9 |
(TO_DATE('2023-01-10') - TO_DATE('2023-01-01')) → 9 |
DATE_PART('day', '2023-01-10'::timestamp - '2023-01-01'::timestamp) → 9 |
| Formatowanie daty |
FORMAT(GETDATE(), 'yyyy-MM-dd') |
TO_CHAR(SYSDATE, 'YYYY-MM-DD') |
TO_CHAR(NOW(), 'YYYY-MM-DD') |
| GROUP_CONCAT |
STRING_AGG(column, ',') |
LISTAGG(column, ',') |
STRING_AGG(column, ',') |
| Generowanie GUID |
NEWID() |
SYS_GUID() |
gen_random_uuid() (wymaga rozszerzenia pgcrypto) |
| Kopia tabeli |
CTAS |
CTAS |
SELECT * INTO NewTable FROM ExistingTable WHERE Condition; |