How do I delete all rows except one in SQL?

How can I delete multiple rows from different values in SQL?

To remove one or more rows in a table:

  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.

How do I SELECT all rows except one in SQL?

The SQL EXCEPT operator is used to return all rows in the first SELECT statement that are not returned by the second SELECT statement. Each SELECT statement will define a dataset. The EXCEPT operator will retrieve all records from the first dataset and then remove from the results all records from the second dataset.

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How do I delete duplicate rows but keep one in SQL?

One way to delete the duplicate rows but retaining the latest ones is by using MAX() function and GROUP BY clause.

How do you eliminate duplicate rows in SQL query without distinct?

Below are alternate solutions :

  1. Remove Duplicates Using Row_Number. WITH CTE (Col1, Col2, Col3, DuplicateCount) AS ( SELECT Col1, Col2, Col3, ROW_NUMBER() OVER(PARTITION BY Col1, Col2, Col3 ORDER BY Col1) AS DuplicateCount FROM MyTable ) SELECT * from CTE Where DuplicateCount = 1.
  2. Remove Duplicates using group By.

How do you remove duplicates from snowflakes?

The following methods can be used to remove duplicate records Snowflake table.

  1. Use DISTINCT Keyword.
  2. ALTER TABLE using SWAP WITH method.
  3. Use ROW_NUMBER Analytic function.
  4. Use GROUP BY Clause to Remove Duplicate Records.

Which can be used to delete all the rows if a table?

The SQL TRUNCATE command is used to delete all the rows from the table and free the space containing the table.

What is the SQL query to delete all rows in a table without deleting the 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.

How do I delete multiple rows in Excel?

1. Delete multiple rows in Microsoft Excel through the contextual menu

  1. Open Microsoft Excel sheet which has the data you wish to manipulate.
  2. From the data, select all the rows you want to delete in one stretch.
  3. Now, right-click on the selection to open the contextual menu.
  4. Hit ‘Delete’.
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How do I select all but one row?

Select the header or the first row of your list and press Shift + Ctrl + ↓(the drop down button), then the list has been selected except the first row. Note: If there are blank cells in your list, it will select the list until the first blank cell appears with this method.

How can I retrieve all rows except last row in SQL?

The easiest way to do this is to discard the row in the application. You can do it in SQL by using a calculated limit. Calculate it as (SELECT COUNT(*) FROM T) – 1 . Excluding the last row.

How do you except a row in SQL?

The EXCEPT operator is used to exclude like rows that are found in one query but not another. It returns rows that are unique to one result. To use the EXCEPT operator, both queries must return the same number of columns and those columns must be of compatible data types.

How can I delete duplicate rows?

Remove duplicate values

  1. Select the range of cells that has duplicate values you want to remove. Tip: Remove any outlines or subtotals from your data before trying to remove duplicates.
  2. Click Data > Remove Duplicates, and then Under Columns, check or uncheck the columns where you want to remove the duplicates. …
  3. Click OK.

How do I count duplicate rows in SQL?

How to Find Duplicate Values in SQL

  1. Using the GROUP BY clause to group all rows by the target column(s) – i.e. the column(s) you want to check for duplicate values on.
  2. Using the COUNT function in the HAVING clause to check if any of the groups have more than 1 entry; those would be the duplicate values.
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How do I remove duplicate rows in select query?

The go to solution for removing duplicate rows from your result sets is to include the distinct keyword in your select statement. It tells the query engine to remove duplicates to produce a result set in which every row is unique. The group by clause can also be used to remove duplicates.