企业官网建设流程全解析

Oracle

Flink SQL

SELECT SYSDATE FROM DUAL;

SELECT 1+1 FROM DUAL;

SELECT CURRENT_TIMESTAMP;

SELECT 1+1;

Oracle

Flink SQL

SELECT * FROM t

WHERE ROWNUM

SELECT * FROM (

SELECT *, ROW_NUMBER() OVER

(ORDER BY proctime) AS rn

FROM t

) WHE