sqlite查找数据库的总行数

Question

我花了很多时间来寻找解决方法，但我可以找到解决方案。

我正在尝试返回数据库中的总行数

这是我为了拉出特定类型的所有类型而采取的措施。

var film_list = tx.executeSql('SELECT * FROM mydb WHERE genre = "Comedy"');

我该怎么办

 var film_total = tx.executeSql('SELECT * FROM mydb TOTAL_ROW_COUNT "');
 console.log(film_total)

Answer 1

您必须遍历每个表格，并将各个计数加起来。

SELECT Count(*) FROM TableName

Answer 2

var totalRowCount = 0;   
var genres = new Array("Comedy","Horror","Romantic","Action","Thriller","Indy");
for(var i = 0; i < genres.length; i++){
    var cmdString ="SELECT COUNT(*) FROM mydb WHERE genre = '";
    cmdString.concat(genres[i];
    var genreCount = tx.executeSql(cmdString);
    totalRowCount +=  genreCount;
}