SQL QUIZPoints: 25 out of 25 1. What does SQL stand for? You answered: 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 ...
var sql = "UPDATE customers SET address = 'Canyon 123' WHERE address = 'Valley 345'"; con.query(sql, function (err, result) { if (err) throw err; console.log(result.affectedRows + " record(s) updated"); }); }); Run example » Notice...
mycursor =mydb.cursor() sql ="DROP TABLE customers" mycursor.execute(sql) Run example » Drop Only if Exist If the table you want to delete is already deleted, or for any other reason does not exist, you can use the IF EXISTS keyword to avoid getting an error. ...
adCmdTable2Evaluates CommandText as a table name whose columns are all returned by an internally generated SQL query. adCmdStoredProc4Evaluates CommandText as a stored procedure name. adCmdUnknown8Indicates that the type of command in the CommandText property is not known. ...
Well organized and easy to understand Web building tutorials with lots of examples of how to use HTML, CSS, JavaScript, SQL, Python, PHP, Bootstrap, Java, XML and more.
In this course, you will learn how to use the EXPLAIN command to gain insight into the execution of your SQL query. This includes how long your query would run, and how many resources it would consume. Free Training PostgreSQL Fundamentals: SQL Command Line Fundamental 0 hour 15 minutes ...
Database.QuerySingle(SQLstatement [, parameters]) Executes SQLstatement (with optional parameters) and returns a single record. Database.QueryValue(SQLstatement [, parameters]) Executes SQLstatement (with optional parameters) and returns a single value.❮...