ELSE dbms_lock.sleep(0); END IF; END; SELECT CASE WHEN condition THEN true-part ELSE false-part END; (P): SELECT CASE WHEN (1=1) THEN 'A'
SELECT city, COUNT(*) AS count FROM entInfo WHERE department = '江西商务厅' AND city IN ( '南昌市', '景德镇市', '萍乡市', '九江市', '新余市', '鹰潭市', '赣州市', '吉安市', '宜
select user from dual #当前用户 SELECT banner FROM v$version WHERE banner LIKE 'Oracle%'; #oracle版本 select wmsys.wm_concat.
The first element is instead passed as the memo in the invocation of the iteratee on the next element in the list.