1.查詢當(dāng)前年、月、周相關(guān)時(shí)間

1.1.查詢當(dāng)前年份

SELECT TO_CHAR(SYSDATE,’YYYY’) AS YEAR FROM DUAL–查詢當(dāng)前年份
SELECT TO_CHAR(SYSDATE,’YYY’) AS YEAR FROM DUAL–查詢當(dāng)前年份后兩位
SELECT TO_CHAR(SYSDATE,’YY’) AS YEAR FROM DUAL–查詢當(dāng)前年份最后兩位
SELECT TO_CHAR(SYSDATE,’Y’) AS YEAR FROM DUAL–查詢當(dāng)前年份最后一位