当我阅读here如果我想在PostgreSQL数据库中插入另一个表时我必须使用它:
此查询插入另一个表中的某些行
INSERT INTO books (id, title, author_id, subject_id)
SELECT nextval('book_ids'), title, author_id, subject_id
FROM book_queue WHERE approved;
但是如何使用我的自定义数据(默认或非默认)插入包含更多列的行?
,例如books (id, title, author_id, <a cell with my data1>,subject_id,<a cell with my data2>)
如何在插入表格之前更新所选数据?
是的,例如:INSERT INTO books (id, title, author_id, subject_id)
SELECT nextval('book_ids'), title, author_id+1, subject_id/2
FROM book_queue WHERE approved;
答案 0 :(得分:1)
插入插入行,并选择generate / forms 行,因此如果您可以使用任何select
语句构建要插入的数据,则可以插入它,即使存在是新字段或更新字段。例如:
INSERT INTO books (title, author_id, subject_id, combined)
SELECT title, author_id+1, subject_id/2, author_id || ' ' || title
FROM book_queue WHERE approved;
以下是fiddle。