我需要查明是否存在记录,以便我能够更新或删除它。
就我所知,一切都需要交易,选择一个计数是行不通的。
我几乎找不到任何有用的文档,我现有的代码是:
app.database.db.transaction(function (tx) {
$.each(result.specoffer, function (i, item) {
if (typeof item.id != 'undefined') {
var sql = '' +
'IF EXISTS SELECT id FROM Specials WHERE id = ' + item.id + ' ' +
'UPDATE Specials SET picture = "' + item.picture + '", startdate = "test", finishdate = "test", mess = "' + item.mess + '", shortmess = "' + item.picture +
'", shortmess = "' + item.shortmess + '", name = "' + name + '" WHERE id = ' + item.id + ' ' +
'ELSE ' +
'INSERT INTO Specials (id, picture, startdate, finishdate, mess, shortmess, name) VALUES (' +
item.id + ', "' + item.picture + '", "test", "test", "' + item.mess + '", "' + item.shortmess + '", "' + item.name + '")';
tx.executeSql(sql);
}
});
非常感谢任何帮助
答案 0 :(得分:1)
您可以直接使用更新或删除
db.transaction(function(tx) {
tx.executeSql('UPDATE Category SET categoryName="' + categoryName
+ '",categoryIconPath="' + categoryIconPath
+ '",categoryDescription="' + categoryDescription
+ '" WHERE categoryId=' + categoryId + '', [], function(tx,
result) {
}, errorCB);
分别放下你的表名和列。这里categoryId就像item.Id一样独特