DROP DATABASE my_database; Here, the SQL command will delete a database named my_database. Also, you need admin or DROP permission to run this command. DROP DATABASE Syntax The syntax of the SQL DROP DATABASE statement is: DROP DATABASE database_name; Here, database_name is the name...
, more commonly known asSQL, theDELETEstatement is one of the most powerful operations available to users. As the name implies,DELETEoperations irreversibly delete one or more rows of data from a database table. Being such a fundamental aspect of data management, it’s important for SQL users...
Once a database is dropped, you can check it in the list of databases with the following SQL command: SHOW DATABASES;Exercise? What is the purpose of the SQL DROP DATABASE statement? To delete a table from a database To delete all records in a table To delete an existing database To...
stmt为Statement对象,执行String sql=”delete from book where bid=’1001’”;语句后,删除数据库表的记录需要执行___语句。相关知识点: 试题来源: 解析 executeUpdate() (1) 本题考查歇后语的理解,作答时可结合常识和文本分析。“猪八戒摔耙子”一般意味着“罢工”“不干了”,在文中的意思可以理解为“不伺候...
TRUNCATE statement: This command is used to delete all the rows from the table and free the space containing the table.SQL DROP Statement:The SQL DROP command is used to remove an object from the database. If you drop a table, all the rows in the table is deleted and the table ...
The SQL DELETE StatementThe DELETE statement is used to delete existing records in a table.DELETE SyntaxDELETE FROM table_name WHERE condition; Note: Be careful when deleting records in a table! Notice the WHERE clause in the DELETE statement. The WHERE clause specifies which record(s) should ...
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 data from a database? You answered: DELE...
Please ensure you want to delete only records that you no longer need. There is no way to restore deleted records after using PACK! DELETE Example DELETE FROM "D:\Data\orders.dbf" WHERE NOT EMPTY(cust_id) PACK Example PACK "D:\Data\orders.dbf"...
UPDATE- updates data in a database DELETE- deletes data from a database INSERT INTO- inserts new data into a database CREATE DATABASE- creates a new database (创建数据库) ALTER DATABASE- modifies a database CREATE TABLE- creates a new table (创建数据表) ...
An UPDATE statement changes the desired records already in the database, but if not used properly, it’s possible to accidentally overwrite records and lose existing data. Without a backup, your data could be corrupted or completely lost, so it’s wise to maintain a backup of your current ...