sqlite - 使用executeSql进行多重插入

Question

我需要多次插入，但不知道出了什么问题。看到：

 db.openDatabase({
      name: "data.db",
      location: "default"
    }).then(() => {
      db.executeSql(
        +"INSERT INTO check_item (name) VALUES ('Pneus - calibragem'); "
        +"INSERT INTO check_item (name) VALUES ('Pneus – banda de rodagem'); "
        +"INSERT INTO check_item (name) VALUES ('Nivel do oleo'); "
        +"INSERT INTO check_item (name) VALUES ('Luzes dianteiras'); "
        +"INSERT INTO check_item (name) VALUES ('Luzes traseiras'); "
        +"INSERT INTO check_item (name) VALUES ('Triangulo de sinalizacao'); "
        +"INSERT INTO check_item (name) VALUES ('Chave de roda'); "
        +"INSERT INTO check_item (name) VALUES ('Documentacao do veiculo'); ", {}).then((data) => {
          console.log("TABLE CREATED: ", data);
        }, (error) => {
          console.error("Unable to execute sql teste", error);

        })
    }, (error) => {
      console.error("Unable to open database", error);
    });

我怎样才能解决这个问题？

Answer 1

您当前正在尝试在对executeSql()的单个调用中执行多个插入语句。在单个语句中插入多个记录的语法为：

INSERT INTO check_item (name)
VALUES ('Pneus - calibragem'),
       ('Pneus – banda de rodagem'),
       ('Nivel do oleo'),
       ...
       ('Documentacao do veiculo');

如果要防止插入已经存在的名称的可能性，最简单的方法可能是在name列上添加唯一约束。如果不重新创建表就不可能在SQLite中做到这一点，我们可以添加一个唯一索引以获得相同的效果：

CREATE UNIQUE INDEX name_index ON check_item (name);

进一步阅读：How to add unique constraint in already made table in sqlite ios?