Small. Fast. Reliable.
Choose any three.

选择核心

SELECT DISTINCT result-column , ALL FROM table-or-subquery join-clause , WHERE expr GROUP BY expr HAVING expr , WINDOW window-name AS window-defn , VALUES ( expr ) , ,

使用者：   复合选择stmt   分解选择stmt   简单选择stmt

参考：   expr    join-clause    result-column    table-or-subquery

另请参见：   lang_select.html