mysql - Express query for SQL -

i dynamically trying pass name of table sql query in part of express code below

background information::

• what passing (key,value) string name of table in sql database
• why doing dynamically select table based on dynamic client request

problem facing::

• clearly not sunig sql query correctly
• how solve this

[expresscode]

app.get('/restaurantdesc/:key',function(request,response,next){      var keyname=request.params.key;     var name_of_restaurants, restauranttimings;     async.series( [         // first table contents         function ( callback ) {             connection.query('select * keyname', function(err, rows, fields)                 {                         console.log('connection result error '+err);                         name_of_restaurants = rows;                         callback();                 });         },         // second table contents         function ( callback ) {         connection.query('select * restauranttimings', function(err, rows, fields)              {                     console.log('connection result error '+err);                     restauranttimings = rows;                     callback();             });         }     // send response ], function ( error, results ) {     response.json({         'restaurants' : name_of_restaurants,         'restauranttimings' : restauranttimings     }); } ); } ); 

considering keyname , restauranttimings table name. try this:-

app.get('/restaurantdesc/:key',function(request,response,next){      var keyname=request.params.key;     var name_of_restaurants, restauranttimings;      async.series( [         // first table contents         function ( callback ) {             connection.query('select * ', keyname, function(err, rows, fields)                 {                         console.log('connection result error '+err);                         name_of_restaurants = rows;                         callback();                 });         },         // second table contents         function ( callback ) {         connection.query('select * ', restauranttimings, function(err, rows, fields)              {                     console.log('connection result error '+err);                     restauranttimings = rows;                     callback();             });         }     // send response ], function ( error, results ) {     response.json({         'restaurants' : name_of_restaurants,         'restauranttimings' : restauranttimings     }); } ); } );