sql first day of current year
SELECT DATEADD(yy, DATEDIFF(yy, 0, GETDATE()), 0); -- SQL Server
SELECT TRUNC(sysdate, 'YEAR') FROM DUAL; -- Oracle
SELECT MAKEDATE(year(now()), 1); -- MySQL
sql first day of current year
SELECT DATEADD(yy, DATEDIFF(yy, 0, GETDATE()), 0); -- SQL Server
SELECT TRUNC(sysdate, 'YEAR') FROM DUAL; -- Oracle
SELECT MAKEDATE(year(now()), 1); -- MySQL
select first and last row sql
SELECT
(SELECT * FROM tableName ORDER BY col1 LIMIT 1) AS first,
(SELECT * FROM tableName ORDER BY col1 DESC LIMIT 1) AS last
;
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