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Foreign Key constraint doesn't work

由 时光总嘲笑我的痴心妄想 提交于 2020-12-04 14:30:33
问题 I have two tables, theme and quiz , here is their definition: CREATE TABLE "theme" ("id" INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL , "nom" VARCHAR NOT NULL ); CREATE TABLE quiz( id INTEGER PRIMARY KEY, nom VARCHAR(256) NOT NULL, theme INTEGER NOT NULL, niveau INTEGER NOT NULL, pass INTEGER DEFAULT 1 NOT NULL, jok INTEGER DEFAULT 1 NOT NULL, etat INTEGER DEFAULT 0 NOT NULL, FOREIGN KEY (theme) REFERENCES theme(id) ); The field id (the primary key) in the table theme is a Foreign Key in the

Foreign Key constraint doesn't work

由 五迷三道 提交于 2020-12-04 14:28:48
问题 I have two tables, theme and quiz , here is their definition: CREATE TABLE "theme" ("id" INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL , "nom" VARCHAR NOT NULL ); CREATE TABLE quiz( id INTEGER PRIMARY KEY, nom VARCHAR(256) NOT NULL, theme INTEGER NOT NULL, niveau INTEGER NOT NULL, pass INTEGER DEFAULT 1 NOT NULL, jok INTEGER DEFAULT 1 NOT NULL, etat INTEGER DEFAULT 0 NOT NULL, FOREIGN KEY (theme) REFERENCES theme(id) ); The field id (the primary key) in the table theme is a Foreign Key in the

Run multiple commands in sqlite manager

由 ↘锁芯ラ 提交于 2019-12-19 09:47:04
问题 It's possible to run more than one command in the direct SQL execution in SQlite Manager? (useful if you insert a lot of data) e.g. insert into TestTable (Name, Age) values("Thomas", 25) insert into TestTable (Name, Age) values("Peter", 29) ... Thx 回答1: Solution is very simple ;-) -> use a semicolon to separate the commands insert into TestTable (Name, Age) values("Thomas", 25); insert into TestTable (Name, Age) values("Peter", 29); ... 回答2: Alternatively, you could write the statement as:

Getting a column from .sqlite containing multiple tables with multiple columns

由 妖精的绣舞 提交于 2019-12-18 09:55:40
问题 !Database consists of multiple tables and multiple columns as shown & i have pasted this law.sqlite in assets folder. Database consists of multiple tables and multiple columns as shown & i have pasted this law.sqlite in assets folder. Suppose i want to access all the elements of column AS_name as shown . So how should i code for it? 回答1: Try this: Cursor cursor = db.rawQuery("SELECT DISTINCT AS_name FROM Articles",null); // If you want in order then add "ORDER BY AS_name AESC" in sql query.

SQLite queries much slower using JDBC than in Firefox SqliteManager plugin

由 断了今生、忘了曾经 提交于 2019-12-12 23:33:32
问题 I'm having a problem with a query that I tested in the SQLiteManager plugin in Firefox. This particular query executes in about 60 ms in the Firefox plugin, but it takes a whopping 3.7 seconds to execute when I use the same query and the same database in Java using the latest Sqlite JDBC driver. The Firefox plugin is often a little bit faster for my other queries that work well (50ms faster at the top, sometimes JDBC is faster), but that's probably the overhead of creating the connection and

How to use XULRunner to run SQLite Manager outside of Firefox in Mac OS X Lion?

由 扶醉桌前 提交于 2019-12-10 10:54:23
问题 I have installed XULRunner 11.0 (xr) from here: Downloads - sqlite-manager - Extension for Firefox and other apps to manage any sqlite database - Google Project Hosting I have followed the steps listed here: kiveo - Mac SQLite Manager Standalone App I have read and tried the suggestions here (though they're for version 6.0): stackoverflow: How to Install and run a XulRunner Application on Mac OS X? I am able to get the help listing with this command: /Library/Frameworks/XUL.framework

How can I open a SQLite database in android?

由 こ雲淡風輕ζ 提交于 2019-12-02 01:44:17
问题 If I created a database using another application not through android runtime, let's say using 'SQLite Manager'(firefox extention), how can I then use that database (the .Sqlite file that is generated) in my android application? Since the SQLite is native in the android not an outsider database. 回答1: you can do it by preparing database file(.sqlite) from Sqlite Manager(firefox extention) and then use it in android see example 来源： https://stackoverflow.com/questions/7453153/how-can-i-open-a

How can I open a SQLite database in android?

由 被刻印的时光 ゝ 提交于 2019-12-01 21:12:43
If I created a database using another application not through android runtime, let's say using 'SQLite Manager'(firefox extention), how can I then use that database (the .Sqlite file that is generated) in my android application? Since the SQLite is native in the android not an outsider database. you can do it by preparing database file(.sqlite) from Sqlite Manager(firefox extention) and then use it in android see example 来源： https://stackoverflow.com/questions/7453153/how-can-i-open-a-sqlite-database-in-android

Getting a column from .sqlite containing multiple tables with multiple columns

由 烂漫一生 提交于 2019-11-29 18:50:31
! Database consists of multiple tables and multiple columns as shown & i have pasted this law.sqlite in assets folder. Database consists of multiple tables and multiple columns as shown & i have pasted this law.sqlite in assets folder. Suppose i want to access all the elements of column AS_name as shown . So how should i code for it? Try this: Cursor cursor = db.rawQuery("SELECT DISTINCT AS_name FROM Articles",null); // If you want in order then add "ORDER BY AS_name AESC" in sql query. cursor.moveToFirst(); while(cursor.moveToNext()) { // do Something } Vivek Warde I tried and now the problem

SQLite - alter a table's column type?

由 对着背影说爱祢 提交于 2019-11-29 04:48:27
问题 I am starting a project involving a small database and I am considering to use SQLite. If I create a table and I defined one of the columns as text, but all the values stored are integers - is there a way to change the data type of a column? I am using SQLite Manager and I can't find a function that allows me to do that. Can I do it using a SQL command, or is it a restriction of SQLite? Probably, even with this restriction, one can find some way around and create a new table with the required
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