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
1 Row(s) affected SQL - Truncate SQLTRUNCATEis the fastest way to remove all data from a SQL table, leaving nothing but an empty shell. You might choose to use this command when all the data inside of a table needs to be removed but you'd like the table column definitions to remain ...
Here, the SQL command will delete a row from theCustomerstable if itscustomer_idis5. Example: SQL DELETE command Delete all Rows in a Table TheWHEREclause determines which rows to delete. However, we can delete all rows at once if we omit theWHEREclause. For example, ...
There is an important factor to keep in mind before we proceed ahead.Any row or multiple rows that we delete using the DELETE command can never be retrieved. Thus, in order to avoid scenarios where a row is deleted by mistake, it’s advisable to take a backup of the table before execut...
This bring us to end of this part of tutorial where we learned how delete and truncate command in SQL. Here we learned how to delete column in SQL, how to delete row in SQL and how to deletetable in SQL, and we learned how to use truncate table in SQL....
How to Use the Delete Command in SQL? The most important aspect of a DELETE statement is crafting an exacting WHERE clause. Deleting Rows With IN and IS NULL You can delete specific rows using IN as pat of the WHERE condition of a DELETE statement. This is helpful when choosing a field...
To delete all the rows in a table, useTRUNCATE TABLE.TRUNCATE TABLEis faster than DELETE and uses fewer system and transaction log resources.TRUNCATE TABLEhas restrictions, for example, the table cannot participate in replication. For more information, seeTRUNCATE TABLE (Transact-SQL) ...
Delete Command in SQL Server The simplest syntax of the statement is as follows: Delete FROM <TableName> WHERE <Condition> You need to provide the table name and the criteria/condition for the data (rows) deletion from the table. Note: It is crucial to use the DELETE statement with a co...
SQL Delete StatementThe DELETE Statement is used to delete rows from a table.Syntax of a SQL DELETE StatementDELETE FROM table_name [WHERE condition]; table_name -- the table name which has to be updated.NOTE: The WHERE clause in the sql delete command is optional and it identifies the ...
Using SQL command to delete data Using API to delete a single row Using API to delete multiple rows Using Query API to delete data Simple SELECT queries SELECT queries on JSON collection tables Using Path expressions Using Left Outer joins with parent-child tables Using NESTED TABLES to join pa...