Is Top used in delete query?

Asked By: Yufen Vollmann | Last Updated: 28th February, 2020
Category: technology and computing databases
4.6/5 (46 Views . 29 Votes)
TOP keyword is used with DELETE statement to delete the specified top rows of a table. Example: We have a table "Employees", having the following data. Delete top 2 rows from the table "Employees" where salary is greater than or equal to 20000.

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Similarly, it is asked, what does a delete query do?

A DELETE query is an action query (SQL statement) that deletes a set of records according to criteria (search conditions) you specify. Delete Queries let you: Empty a table (delete all its records) Delete all records with a particular value in a field.

One may also ask, which SQL command is used for deleting users? MySQL | DROP USER. The DROP USER statement in MySQL can be used to remove a user account along with its privileges from the MySQL completely.

In this manner, how do I delete a specific record in SQL?

SQL DELETE

  1. First, you specify the table name where you want to remove data in the DELETE FROM clause.
  2. Second, you put a condition in the WHERE clause to specify which rows to remove. If you omit the WHERE clause, the statement will remove all rows in the table.

Can we use JOIN IN delete query in SQL?

MySQL also allows you to use the INNER JOIN clause in the DELETE statement to delete rows from a table and the matching rows in another table. Similarly, if you omit T2 table, the DELETE statement will delete only rows in T1 table.

39 Related Question Answers Found

How do I create an append query?

  1. Step 1: Create a query to select the records to copy. Open the database that contains the records that you want to copy.
  2. Step 2: Convert the select query to an append query.
  3. Step 3: Choose the destination fields.
  4. Step 4: Preview and run the append query.

What is truncate command in SQL?

In SQL, the TRUNCATE TABLE statement is a Data Definition Language (DDL) operation that marks the extents of a table for deallocation (empty for reuse). Typically, TRUNCATE TABLE quickly deletes all records in a table by deallocating the data pages used by the table.

How do you create a delete query?

To create a delete query, click the Create tab, in the Queries group, click Query Design. In the Show Table dialog box, double-click each table from which you want to delete records, and then click Close. The table appears as a window in the upper section of the query design grid.

How do you write a delete query?

SQL DELETE Statement
  1. DELETE FROM table_name WHERE condition;
  2. Example. DELETE FROM Customers WHERE CustomerName='Alfreds Futterkiste';
  3. DELETE FROM table_name;
  4. Example. DELETE FROM Customers;

What is database delete?


In the database structured query language (SQL), the DELETE statement removes one or more records from a table. A subset may be defined for deletion using a condition, otherwise all records are removed.

How do I make a table query?

Create a make table query
  1. On the Create tab, in the Queries group, click Query Design.
  2. In the Show Table dialog box, double-click the tables from which you want to retrieve data.
  3. In each table, double-click the field or fields that you want to use in your query.
  4. Optionally, add any expressions to the Field row.

Why would you use an append query?

An append query is used to update or change data automatically based on criteria that you specify. An append query is used to add records to an existing table. It is usually better to enter the value of zero rather than have a null value in a field. You can use Undo when running an update or delete query.

What is not like SQL?

The NOT LIKE operator in SQL is used on a column which is of type varchar . Usually, it is used with % which is used to represent any string value, including the null character . The string we pass on to this operator is not case-sensitive.

How do you append rows in SQL?

SQL INSERT statement – insert one row into a table
  1. First, the table, which you want to insert a new row, in the INSERT INTO clause.
  2. Second, a comma-separated list of columns in the table surrounded by parentheses.
  3. Third, a comma-separated list of values surrounded by parentheses in the VALUES clause.

How do you update data in SQL?


SQL UPDATE Statement
  1. First, specify the table name that you want to change data in the UPDATE clause.
  2. Second, assign a new value for the column that you want to update. In case you want to update data in multiple columns, each column = value pair is separated by a comma (,).
  3. Third, specify which rows you want to update in the WHERE clause.

How do I remove all records from a table?

To delete every row in a table:
  1. Use the DELETE statement without specifying a WHERE clause. With segmented table spaces, deleting all rows of a table is very fast.
  2. Use the TRUNCATE statement. The TRUNCATE statement can provide the following advantages over a DELETE statement:
  3. Use the DROP TABLE statement.

What is the difference between delete and truncate?

TRUNCATE is the DDL statement whereas DELETE is a DML statement. Below are the differences between the two: TRUNCATE always removes all the rows from a table, leaving the table empty and the table structure intact whereas DELETE may remove conditionally if the where clause is used.

How do I insert a date field in SQL?

A DATE data type contains both date and time elements. If you are not concerned about the time portion, then you could also use the ANSI Date literal which uses a fixed format 'YYYY-MM-DD' and is NLS independent. For example, SQL> INSERT INTO t(dob) VALUES(DATE '2015-12-17'); 1 row created.

How do you delete a table?

To delete a table, first select the entire table. Click the “Layout” tab under “Table Tools”. Click “Delete” in the “Rows & Columns” section and select “Delete Table” to delete the table.

Where is not in SQL?


IN, NOT IN operators in SQL are used with SELECT, UPDATE and DELETE statements/queries to select, update and delete only particular records in a table those meet the condition given in WHERE clause and conditions given in IN, NOT IN operators. I.e. it filters records from a table as per the condition.

IS NOT NULL SQL?

The IS NOT NULL condition is used in SQL to test for a non-NULL value. It returns TRUE if a non-NULL value is found, otherwise it returns FALSE. It can be used in a SELECT, INSERT, UPDATE, or DELETE statement.

How do you truncate a table in SQL?

The SQL TRUNCATE TABLE command is used to delete complete data from an existing table. You can also use DROP TABLE command to delete complete table but it would remove complete table structure form the database and you would need to re-create this table once again if you wish you store some data.