假设我有这个arrayList:
ArrayList<Personne> personnes = new ArrayList<Personne>();
Personne p1 = new Personne("001590842","51862499", "N5+", "1", "20170201","0");
Personne p2 = new Personne("001590842","51862499", &
我正在开发一个查询,它需要使用此声明中返回的值: DECLARE
V_CD_AM NUMBER;
cursor cd_am_cursor IS
SELECT CD_AMOST
FROM L_CHEG
WHERE SQ_CHEG = 4153839;
BEGIN
OPEN cd_am_cursor;
LOOP
FETCH cd_am_cursor into V_CD_AM;
EXIT WHEN cd_am_cursor%NOTFOUND;
我正在浏览Eclipse plugins的源代码(现在我正在探索类),我注意到很多变量都以f开头。
我知道我们经常给接口加上前缀I,以便第一眼就能很容易地将它们识别为接口。但是f到底是什么意思呢?
下面是一个片段:
......
private int fInheritedDirection; // inherited direction
private int fTextDirection; // requested direction for embedded SourceViewer
private ActionContributionItem f
只是一个小的MySQL语句示例:
SELECT m.nameMarket nm, m.idCity idc, c.cityname cn
FROM markets m
LEFT JOIN cities c ON m.idCity = c.idCity
按预期工作。为什么两者都不能在这里工作(在Join-语句中使用Select中的别名):
SELECT m.nameMarket nm, m.idCity idc, c.cityname cn
FROM markets m
LEFT JOIN cities c ON idc = c.idCity
OR: