SQL DROP TABLE Command - Learn how to use the SQL DROP TABLE command to remove tables from your database effectively. Understand syntax, examples, and best practices.
百度试题 结果1 题目In SQL, the command to drop a table is ( ). A. remove table B. delete table C. clear table D. drop table 相关知识点: 试题来源: 解析 D 反馈 收藏
User A executes the following command to drop a large table in your database: SQL> DROP TABLE trans; While the drop table operation is in progress; user B executes the following command on the same table; SQL> DELETE FROM trans WHERE tr_type='SL'; Which statement is true regarding the...
SELECT tablespace_name FROM all_tables WHERE table_name = 'YOURTABLENAME'; 18 How to remove duplicate rows from a table If the unique/primary keys can be identified from the table, it is easier to remove the records from the table using the following query: DELETE FROM tablename WHERE row...
sqlite>.tablesCOMPANY test.COMPANY This means COMPANY table is available in the database, so let us drop it as follows − sqlite>DROPTABLECOMPANY;sqlite> Now, if you try .TABLES command, then you will not find COMPANY table anymore. ...
DROPDATABASE; However, to do this, there are a couple of steps to take first. Step 1: Shutdown the database. shutdownimmediate; This will shutdown the database, closing all open connections and ensuring the database is in a valid state. ...
In the fourth segment, the string value assigned to the symbol column is coin. use for_char_data_lines; -- create fresh versions of the -- dbo.imported_data_for_a_category and -- the dbo.imported_data_across_categories tables drop table if exists dbo.imported_data_for_a_category; ...
Gives a comment that is reproduced in the trace output (except in the resident trace tables). This option can be used to record why the command was issued. string is any character string; it must be enclosed between apostrophes if it includes a blank, comma, or special character. RMID ...
UPSERT into storeAcct values ("1417114588", {"firstName" : "Dori", "lastName" : "Martin", "email" : "dormartin@usmail.com", "address" : {"Dropbox" : "Presidency College"}}) RETURNING *; In the above example, you use the UPSERT statement to add a new row to thestoreAccttable...
$sql=$dbo->prepare("DROP TABLE student_del "); if($sql->execute()){ echo " Table deleted "; }else{ print_r($sql->errorInfo()); } ?> ←SQL ReferencesHow to delete Records in different tables→ Questions What is the syntax for the SQL `DROP TABLE` command?