How to get table information in a database (SQLite)
我刚接触过sqlite。我在Eclipse(Java)中使用它，以防万一这是相关的。
现在我的问题是我有一个*.db文件，对它的内容一无所知。我想知道怎样才能得到里面桌子的信息。否则，似乎无法通过
1 2 3 4 5 | stmt = c.createStatement(); ResultSet rs = stmt.executeQuery("SELECT * FROM ???????;" ); while ( rs.next() ) { int id = rs.getInt("id"); .. |
1。了解数据库的模式
在.db文件的位置打开终端。
输入以下命令以启动sqlite控制台。
1 | sqlite3 NameOfDatabase.db |
1.1所有表格
然后向控制台发出以下命令：
1 | .schema |
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这将为您提供有关所有表的所有信息，包括字段的数据类型。换句话说，上面的命令会给你，你的
上述命令的输出示例如下：
1 2 | CREATE TABLE log (ID INTEGER PRIMARY KEY AUTOINCREMENT, userID INTEGER, cardID INTEGER, eventID INTEGER, nameOnTicket TEXT, pricePaid REAL); CREATE TABLE card (cardID INTEGER PRIMARY KEY AUTOINCREMENT, cardNum TEXT, securityCode TEXT, expiryMonth INTEGER, expiryYear INTEGER, addressID INTEGER, userID INTEGER); |
它实际上返回了重新创建表的命令，因此，如果您想输出
此外，还可以使用以下命令查看特定表的架构：
1 | .schema TableName |
。
返回
另一种选择是将您的sqlite数据库与eclipse bellow集成，您可以找到实现这一点的步骤。下面的步骤是从官方Eclipsewiki中复制的，您可以在这里找到。
1) Download the SQLite drivers from here. The actual zip file with the
driver is at 3. Expand the zip somewhere locally and note the
location.2) Put the sqlite_jni.dll from the zip into your JRE's bin directory.
The driver requires this file to be in the java library path.3) In Eclipse with DTP 1.0 installed (preferably the final build or a
nightly build dated 110806 or later), go to the Preferences
(Window->Preferences) and select the Connectivity->Driver Definitions
page.4) Select the"Generic JDBC" category in the Available Driver
Definitions tree and click"Add...".5) Select"Generic JDBC Driver->Generic JDBC Driver" in the Available
Driver Templates tree. Give the new generic JDBC driver a name like
"javasqlite JDBC driver". Click OK.6) Click"Add Jar/Zip" and select the sqlite.jar from the driver zip
you expanded in step 1. Click Open.7) In the Properties table, select the Driver Class property and click
the"..." button. If the jar is accessible, you will see a dialog
appear with at lease one class in the list. Select
"SQLite.JDBCDriver". Click OK.8) Also in the Properties table, select the Driver URL property and
type the following: jdbc:sqlite:/DRIVE:/dirA/dirB/dbfile9) Click OK on the Edit Driver Definition dialog. You should see your
new driver appear in the driver list on the Driver Definitions
preference page.10) Click OK to close the Preferences dialog.
11) If the Data Source Explorer is not open, open the
Connectivity->Data Source Explorer view from the Window->Show View
menu or open the Database Development perspective from the
Window->Open Perspective.12) In the Data Source Explorer, right-click on the Databases category
and select New...13) In the New Connection Profile wizard's Wizard Selection Page,
choose the SQL Model-JDBC Connection entry in the list and click Next.14) Give your new profile a name like"SQLiteTestDB". Click Next.
15) In the"Select a driver from the drop-down" combo box, select your
new SQLite driver definition. Modify the file path in the sample URL
to match the path to your local SQLite database.16) Click"Test Connection" to verify you can connect to your
database.17) Click Finish to create the profile.
18) In the Data Source Explorer, right-click on the new profile and
select Connect. You should see content appear in the tree beneath the
profile. Browse through your database to view available tables and
their columns.
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