Selects

Last updated 6 months ago

Specifying A Select Clause

Of course, you may not always want to select all columns from a database table. Using the from method, you can specify a custom from clause for the query:

var getResults = query.from('users')
.get('name,email,age');
writeDump(getResults);

Individual columns can contain fully-qualified names (i.e. "some_table.some_column"), fully-qualified names with table aliases (i.e. "alias.some_column"), and even set column aliases themselves (i.e. "some_column AS c"). Columns can be a single column, a list or columns (comma-separated), or an array of columns.

var getResults = query.from('users')
.get('name as myAccountName,users.email,age');
writeDump(getResults);
var getResults = query.from('users as myTableAlias')
.get( columns = ['name as myAccountName' ,'myTableAlias.email' ,'age'], options= { datasource='myOtherDatasource'} );
writeDump(getResults);

The distinct method allows you to force the query to return distinct results:

var getResults = query.from('users')
.distinct('email');
writeDump(getResults);

If you already have a query builder instance and you wish to add a column to its existing select clause, you may use the addSelect method:

var getResults = query.from('users')
.where('age','>=','18');
getResults = getResults.addSelect('name,email,age').get();
writeDump(getResults);