Structured Query Language Correct Answer! 2. Which SQL statement is used to extract data from a database? You answered: SELECT Correct Answer! 3. Which SQL statement is used to update data in a database? You answered: UPDATE Correct Answer! 4. Which SQL statement is used to delete ...
database:"mydb"});con.connect(function(err){if(err)throwerr;console.log("Connected!");//Add primary key to an existing table:varsql="ALTER TABLE customers ADD COLUMN id INT AUTO_INCREMENT PRIMARY KEY";con.query(sql,function(err,result){if(err)throwerr;console.log("Table altered");})...
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Query The View We can query the view above as follows: Example SELECT*FROM[BrazilCustomers]; Try it Yourself » CREATE OR REPLACE VIEW TheCREATE OR REPLACE VIEWcommand updates a view. The following SQL adds the "City" column to the "Brazil Customers" view: ...
@foreach(var row in db.Query(selectQueryString)) { <tr> <td>@row.Id</td> <td>@row.Name</td> <td>@row.Description</td> <td align="right">@row.Price</td> </tr> } </table> </body> </html> Run example » Example...
Create a collection called "customers": importpymongo myclient = pymongo.MongoClient("mongodb://localhost:27017/") mydb = myclient["mydatabase"] mycol = mydb["customers"] Run example » Important:In MongoDB, a collection is not created until it gets content!
SQL parameters are values that are added to an SQL query at execution time, in a controlled manner.ASP.NET Razor Example txtUserId = getRequestString("UserId");txtSQL = "SELECT * FROM Users WHERE UserId = @0";db.Execute(txtSQL,txtUserId);...
adCmdTable 2 Evaluates CommandText as a table name whose columns are all returned by an internally generated SQL query. adCmdStoredProc 4 Evaluates CommandText as a stored procedure name. adCmdUnknown 8 Indicates that the type of command in the CommandText property is not known. adCmdFile 256 Evalu...
connect(function(err) { if (err) throw err; /*Connect two tables by using one field from each table as the connection point:*/ var sql = "SELECT users.name AS user, products.name AS favorite FROM users JOIN products ON users.favorite_product = products.id"; con.query(sql, function ...
connect(function(err) { if (err) throw err; /*Delete the "customers" table, but only if it already exist (to avoid errors):*/ var sql = "DROP TABLE IF EXISTS customers"; con.query(sql, function (err, result) { if (err) throw err; console.log(result); }); }); { ...