问题与SQLite中插入查询？（可变插入）

Question

我怎样才能SQLite中插入变量的值，我无法找到问题，我的代码，如果我使用INSERT语句如下这是工作和值插入，

tx.executeSql('INSERT INTO Locationlog (Coordinates, Location, Category, Address) VALUES ("manju", "kishor", "ramesh", "ram")'); 

如果我尝试插入如下值没有被插入，

tx.executeSql('INSERT INTO Locationlog (Coordinates, Location, Category, Address) VALUES (?,?,?,?)',[Latlongs,Location,Category,Address]); 

不用于查询像工作，

tx.executeSql('INSERT INTO Locationlog (Coordinates, Location, Category, Address) VALUES ('+Latlongs+', '+Location+', '+Category+', '+Address+')'); 

我对所有列使用TEXT作为数据类型，输入值大小在1-100之间。 TEXT数据类型的最大大小是多少？任何人都可以建议如何在插入查询中插入变量？

var Latlongs = $("#defendLatlongs").val(); 
    var Location = $("#defendLocation").val(); 
    var Category = $("#defendcategory").val(); 
    var Address = $("#defendAddress").val(); 

    var db = window.sqlitePlugin.openDatabase({name: "MYDB"}); 
    db.transaction(function (tx) { 
    tx.executeSql('CREATE TABLE IF NOT EXISTS Locationlog (Coordinates TEXT, Location TEXT, Category TEXT, Address TEXT)'); 
    }); 
    db.transaction(function (tx){ 
    tx.executeSql('INSERT INTO Locationlog (Coordinates, Location, Category, Address) VALUES (?,?,?,?)',[Latlongs,Location,Category,Address]); 


}); 

}); 

Answer 1

附加id属性

var db = window.sqlitePlugin.openDatabase({name: "MYDB"}); 
db.transaction(function (tx) { 
tx.executeSql('CREATE TABLE IF NOT EXISTS Locationlog (id INTEGER PRIMARY KEY AUTOINCREMENT,Coordinates TEXT, Location TEXT, Category TEXT, Address TEXT)'); 
}); 
db.transaction(function (tx){ 
tx.executeSql('INSERT INTO Locationlog (Coordinates, Location, Category, Address) VALUES (?,?,?,?)', [Latlongs,Location,Category,Address]);