標籤:http://www.yunqa.de/delphi/doku.php/products/sqlitespy/indexSQLiteSpy is a fast and compact GUI database manager for SQLite. It reads SQLite3 files and executes SQL against them. Its graphical user interface makes it very easy
標籤:一、order by語句概述order by語句用於根據指定的列對結果集進行排序。order by 語句預設按照升序對記錄進行排序。如果您希望按照降序對記錄進行排序,可以使用 desc 關鍵字二、以字母順序顯示name文法:select * from personsorder by name;三、以字母順序顯示name,並以數字順序顯示id文法:select * from personsorder by name,id;四、以字母逆序顯示name文法:select * from
標籤:Backing up the databaseTo make a backup copy of the database, simply do a "dump" and redirect the results to a file.cd /home/sqlitesqlite3 sample.db .dump > sample.bakRestoring the databaseRestoring the database from a backup is just as easy
標籤:abs(X)abs(X)返回 X 的絕對值。Abs(X) returns NULL if X is NULL.Abs(X) return 0.0 if X is a string or blob that cannot be converted to a numeric value. If X is the integer -9223372036854775807 then abs(X) throws an integer overflow error
標籤:php官網一段留言IMPORTANT! just a note: weird behaviour when doing an exec on a sqlite db!!!if want to execute a query on a sqlite db with exec, and your dbfile already was e.g. mode 777, and you get some php errors saying"SQLite3::exec(): unable to
標籤: 你可能在批量處理一個事務的時候,想要批量插入一系列的資料,但是這些資料當添加完一次之後,重新添加的時候,你不想要重新添加,只是想將原有的資料進行更新,例如:我想要通過Excel將一系列的圖書匯入到資料庫中,而這些圖書在你下一次編輯之後,重新匯入,只是對原有的資料進行修改。以上是一個業務的情境。在MSSQL中,你可以使用諸如:?IF NOT EXISTS(SELECT * FROM Book WHERE ….)