How to use the SQL statement of HTML5 database
This article mainly introduces "how to use SQL statements in HTML5 database". In daily operation, I believe many people have doubts about how to use SQL statements in HTML5 database. The editor consulted all kinds of materials and sorted out simple and easy-to-use operation methods. I hope it will be helpful to answer the doubts about "how to use SQL statements in HTML5 database". Next, please follow the editor to study!
/ / 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 copy 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")
});
});
At this point, the study on "how to use SQL statements in HTML5 database" is over. I hope to be able to solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!
