How to use the SQL statement of HTML5 Web Database database
How to use the SQL statement of HTML5 Web Database database, many novices are not very clear about this, in order to help you solve this problem, the following editor will explain in detail for you, people with this need can come to learn, hope you can gain something.
/ / the openDatabase method opens an existing database. If it does not exist, a database is created. The parameters are the name of the database, the version, the description of the database, and the data size var db = window.openDatabase ("mydatabase", "1.0", "my database description", 20000).
How to use the SQL statement of database
Dbname.transaction (function (tx) {tx.executeSql (sql);})
The code is as follows:
/ / the openDatabase method opens an existing database. If it does not exist, a database will be created.
Var db = window.openDatabase ("mydatabase", "1.0", "my database description", 20000)
Var d = new Date ()
/ / create a data table
Var sql = "CREATE TABLE mytable (mytitle TEXT, timestamp REAL)"
Db.transaction (function (tx) {
Tx.executeSql (sql)
});
/ / insert data into the data table
Db.transaction (function (tx) {
Tx.executeSql ("INSERT INTO mytable (mytitle, timestamp) values (?)", ["Huabu Software College of Guangzhou University 3", d.toLocaleString ()], null, null)
});
/ / Delete the data table
/ / db.transaction (function (tx) {
/ / tx.executeSql ("DROP TABLE mytable")
/ /})
Db.transaction (function (tx) {
Tx.executeSql ("SELECT * FROM mytable", []
Function (tx, result) {
For (var I = 0; I < result.rows.length; iTunes +) {
[xss_clean] (''+
Result.rows.item (I) ['mytitle'] + "+
Result.rows.item (I) ['timestamp'] +
'')
}
}
Function () {
Alert ("error")
});
});
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