Web 中的重复数据 SQL

Question

如何让数据不重复 如何自动插入 id 行

db.transaction(function (tx) {
    tx.executeSql('CREATE TABLE IF NOT EXISTS logins (Username, Password)');
});
db.transaction(function (tx) {
    tx.executeSql('INSERT INTO logins VALUES ("Ahmed","123")');
    tx.executeSql('INSERT INTO logins VALUES ("Ahmed","123")');
});

Answer 1

你可以试试

db.transaction(function (tx) {
    tx.executeSql('CREATE TABLE IF NOT EXISTS logins (Username UNIQUE, Password)');
    tx.executeSql('INSERT INTO logins VALUES ("Ahmed","123")');
    tx.executeSql('INSERT INTO logins VALUES ("Ahmed","123")');
});