问题描述 最近搜索关键词,去除重复 解决方案 1 2 3 4 5 6 7 8 9 10 11 12 -- 使用rowid标识解决重复问题 DELETE FROM your_table WHERE rowid not in (SELECT MIN(rowid) FROM your_table GROUP BY column1, column2, column3); -- method1 DELETE from table_name where rowid not in (select min(rowid) FROM table_name group by column_name);……
新手与专家思维区别 》》从总体出发 Stage 1: Novice 特点 Novices don’t particularly want to learn; they just want to accomplish an immediate goal. They do not know how to respond to mistakes and so are fairly vulnerable to confusion when things go awry. Stage 2: Improved Beginner Stage 3: Competent Stage 4: Proficient Stage 5: Expert Software isn’t designed in……
Programming is all about problem solving. It requires creativity, ingenuity, and invention. Regardless of your profession, you probably also have to solve problems creatively. However, for programmers, combining rich, flexible human thought with the rigid constraints of a digital computer exposes the power and the deepest flaws of both. translate to chinese 编程就是解决问题。需要创意, 独创性和发明。无论您的职业是……
使用Thumbnails包对图片添加水印效果 Thumbnails are ideally implemented on web pages as separate, smaller copies of the original image, in part because one purpose of a thumbnail image on a web page is to reduce bandwidth and download time. 。。。 Thumbnail@wiki 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19……