#row_number()

SQL analytic functions in Oracle, with input and output examples Analytic functions (also called window functions) operate over a set of rows and return values for each row, unlike aggregate functions which collapse rows into one. Top 10 Analytic Functions in Oracle FunctionPurposeExample InputExample QueryExample OutputROW_NUMBER()Assigns unique sequential number to rowsEmployees table with…

Get the first record added per day group by the user in SQL

In the previous post Get the last record added per day group by the user in SQL I explained How to get the last entry for each user per day.

In this post, I am gonna to explain

How to get the first record added per day for each user in SQL.

Get the first entry added per day for each user in SQL

Consider you have a [Transaction] table to save multiple transactions for different users…

Get the first record added per day group by the user in SQL

In the previous post Get the last record added per day group by the user in SQL I explained How to get the last entry for each user per day.

In this post, I am gonna to explain

How to get the first record added per day for each user in SQL.

Get the first entry added per day for each user in SQL

Consider you have a [Transaction] table to save multiple transactions for different users…

Row_Number() function for providing sequence number as per your wish TIP #35

  Sometimes we require sequence column or we can a row number column so we have ROW_NUMBER() function in SQL SERVER.

Lets understand this by following example

In this example we have  person table which have firstname, last name, middlename  columns. Now we want to fetch records  with a extra column ROW_Number() so we write following query

SELECT ROW_NUMBER() OVER (ORDER BY LastName) As…