Question

I am building a local database with this :

var db = openDatabase('LIST','1.0','database', 2*1024*1024);

db.transaction(function (tx) {
  tx.executeSql('CREATE TABLE IF NOT EXISTS entry (ID INTEGER PRIMARY KEY ASC, first TEXT, last TEXT, email TEXT, phone TEXT, contest TEXT, added_on DATETIME)');
});

db.transaction(function(tx){
  tx.executeSql('INSERT INTO entry (first, last, email, phone, contest, added_on) VALUES (?,?,?,?,?,?)',
  [vFirst, vLast, vEmail, vPhone, vContest, addedOn]);
});

How would I populate a div with count of total rows in the database? I guess I would use something like SELECT COUNT(*) FROM entry .. but I am unclear on how to write this or print the output on the page.

If I was using local storage I see I could do something as simple as var length = window.localStorage.length; but I can not figure out how to do something similar with SQL.

Answer 1

If you want to count all rows from entry table, then SELECT COUNT(*) FROM entry
If you want to know count of rows in database, then UNION queries from different tables and sum using SUM()

EDIT:

db.transaction(function(tx) {
   tx.executeSql("SELECT COUNT(*) FROM entry", [],
      function(tx, result) {
         //console.log(result.rows);
         console.log(result.rows.item(0)["count(*)"]);

         // do the html stuff to push this value to div
      },
      function(tx, error){
         // error occured
      }
   );
});