sqlite

问题 I have a scenario where number of columns is 2600. As mentioned in SQLite limits the maximum column supported is 2000. Now I need to update the column numbers during run time, the definition, The maximum number of columns can be lowered at run-time using the sqlite3_limit(db,SQLITE_LIMIT_COLUMN,size) interface. is not clear to me. The code I'm using is, Class.forName("org.sqlite.JDBC"); conn = DriverManager.getConnection("jdbc:sqlite:database.db"); conn.setAutoCommit(false); stmt = conn

问题 I have a scenario where number of columns is 2600. As mentioned in SQLite limits the maximum column supported is 2000. Now I need to update the column numbers during run time, the definition, The maximum number of columns can be lowered at run-time using the sqlite3_limit(db,SQLITE_LIMIT_COLUMN,size) interface. is not clear to me. The code I'm using is, Class.forName("org.sqlite.JDBC"); conn = DriverManager.getConnection("jdbc:sqlite:database.db"); conn.setAutoCommit(false); stmt = conn

问题 I have a scenario where number of columns is 2600. As mentioned in SQLite limits the maximum column supported is 2000. Now I need to update the column numbers during run time, the definition, The maximum number of columns can be lowered at run-time using the sqlite3_limit(db,SQLITE_LIMIT_COLUMN,size) interface. is not clear to me. The code I'm using is, Class.forName("org.sqlite.JDBC"); conn = DriverManager.getConnection("jdbc:sqlite:database.db"); conn.setAutoCommit(false); stmt = conn

问题 I have a scenario where number of columns is 2600. As mentioned in SQLite limits the maximum column supported is 2000. Now I need to update the column numbers during run time, the definition, The maximum number of columns can be lowered at run-time using the sqlite3_limit(db,SQLITE_LIMIT_COLUMN,size) interface. is not clear to me. The code I'm using is, Class.forName("org.sqlite.JDBC"); conn = DriverManager.getConnection("jdbc:sqlite:database.db"); conn.setAutoCommit(false); stmt = conn

问题 i have this structure - its series of games registered each game has min 2 players, but can have up to many people playing in the same game : gamenumber,team,name,points 1000,team tower, Tom Smith, 100 1000,team vegas, John Little, 90 1000,team windy, Andy Cooper, 20 1001,team woods, Marie Jones, 120 1001,team windy, Andy Cooper, 40 1002,team woods, Marie Jones, 20 1002,team tower, Tom Smith, 11 1003,team tower, Tom Smith, 89 1003,team bars, Jonathan Swift, 21 1003,team hammock, Bill Mccain,

问题 Hello Everyone I am newbie in Android, I need to parse json object and display it in listView and at the same time to save those data in SQLite, but whenever I run the project exception is caught ... the database is created without any data or value in it. here is the code by which I am trying: Bundle bundle = getIntent().getExtras(); String rfiItems = bundle.getString("allData"); final ArrayList<HashMap<String, String>> mylist4 = new ArrayList<HashMap<String, String>>(); try{ JSONObject jObj

问题 Hello Everyone I am newbie in Android, I need to parse json object and display it in listView and at the same time to save those data in SQLite, but whenever I run the project exception is caught ... the database is created without any data or value in it. here is the code by which I am trying: Bundle bundle = getIntent().getExtras(); String rfiItems = bundle.getString("allData"); final ArrayList<HashMap<String, String>> mylist4 = new ArrayList<HashMap<String, String>>(); try{ JSONObject jObj

问题 In my app I am doing read ,write and delete on sqlite database(in db form) and it work fine in simulator but not working in actual device (giving error: No such table found ).I try very hard to look for solution but couldn't find one or may be i misread something. My db is in the /users/My Name/library/developer/Core simulator/devices/devicen-id/data/application/app-id/documents/My database. - (NSString *) getWritableDBPath { NSArray *paths = NSSearchPathForDirectoriesInDomains

问题 In my app I am doing read ,write and delete on sqlite database(in db form) and it work fine in simulator but not working in actual device (giving error: No such table found ).I try very hard to look for solution but couldn't find one or may be i misread something. My db is in the /users/My Name/library/developer/Core simulator/devices/devicen-id/data/application/app-id/documents/My database. - (NSString *) getWritableDBPath { NSArray *paths = NSSearchPathForDirectoriesInDomains

问题 I am using the sqlite wrapper here to access my sqlite database in Swift. I wrote this code based on the wrapper to count the items on a table. public func numberOfRows() -> Int { let cmd = """ SELECT count(*) from \(self.tableName) """ do{ let db = DatabaseUtils.getInstance().getConnection() let stmt = try db.prepare( cmd ) if try stmt.step() == .row { return Int(from: stmt,index: 1) ?? -1 } return -1 }catch { Log.out("Error occurred while fetching count data in \(tableName)") return -1 } }