Android 判断数据库中是否存在某个表

</pre><p style="margin-top:0px; margin-bottom:0px; padding-top:0px; padding-bottom:0px; font-family:Arial; font-size:14px; line-height:26px"><pre name="code" class="java">public boolean tableIsExist(String tabName, SQLiteDatabase db) {
		boolean result = false;
		if (tabName == null) {
			return false;
		}
		Cursor cursor = null;
		try {

			String sql = "select count(*) as c from sqlite_master where type ='table' and name ='" + tabName.trim() + "' ";
			cursor = db.rawQuery(sql, null);
			if (cursor.moveToNext()) {
				int count = cursor.getInt(0);
				if (count > 0) {
					result = true;
				}
			}

		} catch (Exception e) {
			// TODO: handle exception
		}
		return result;
	}

对sqlite_master表查询不但可以得到建表的sql语句，还可以获取该数据库内的trigger信息

 

而在纯java环境下对SQL数据库查询是否目标表格存在的时候可以更简单：

java.sql.Connection con = getYourConnection(); 
   
ResultSet rs = con.getMetaData().getTables(null, null, "yourTable", null );
if (rs.next()) {
//yourTable exist
}else {
//yourTable not exist
}