Dynamic group by query - mysql

Question

I need to fire a dynamic group by query using an array.
a=['Branch','Company','Name'];
now , I need the query like
"select Branch,Company,Name,count(Name) as count from myTable group by Branch,Company,Name;"
Kindly suggest!!

Answer 1

Using your initial question data:
a=['Branch','Company','Name'];
function addCount(a) {
db.transaction(function (tx) {
str=a.join(", ");
tx.executeSql("select "+str+",count(*) as count from documentProperty GROUP BY "+str+";", [], function (tx, result) {
if (result != null && result.rows != null) {
for (var i = 0; i < result.rows.length; i++) {
var row = result.rows.item(i);
console.log(row);
}
}
});
});
}

Answer 2

Try this:
String quryString = "select Branch,Company,Name,count(Name) as count from myTable group by " ;
for (int i = 0; i < a.length; i++)
quryString =quryString +a[i];
now use quryString and fire your query.

Answer 3

Thanks Guys,
I tried and finally got my result from the following code.
jsonString=[{"field":"Branch"},{"field":"Company"},{"field":"Name"}]
function addCount(jsonString){
var a=[];
var str="";
$.each(jsonString,function (i,result){
a.push(result.field);
if(i == jsonString.length-1){
str += result.field;
} else{
str += result.field+",";
}
});
db.transaction(function (tx) {
var q=(a.length-1);
var query="select "+str+",count("+a[q]+") as count from documentProperty GROUP BY "+str+";"; console.log(query);
tx.executeSql(query, [], function (tx, result) {
if (result != null && result.rows != null) {
for (var i = 0; i < result.rows.length; i++) {
var row = result.rows.item(i);
console.log(row);
}
}
});
});
}