Updating values in sql

18-Dec-2019 11:48 by 4 Comments

Updating values in sql

The function uses the following syntax: placeholder refers to the increment (such as a day or a month) you want to add or subtract from a date/time value.

The first argument, dd, indicates the days to be added to the date.Even so, there might be times when you want to add or subtract a time interval from a date/time value.For example, you might want to add months or days to the value or, perhaps, even hours.The function takes three arguments: mm refers to months, 3 refers to the number of months and Order Date is the DATETIME value. Up to this point, the examples have shown you how to modify a date/time value as you retrieve it from the database.As a result, three months will be added to the Order Date value when the query returns the value, as shown in the following results: As you can see, the new date is Aug. You can also use the DATEADD function to insert date/time data.As a result, 10 days were added to the current date and time and inserted into the Deliv Date column.

Here are the results generated by the SELECT statement: As expected, the Deliv Date value is 10 days later than the Order Date value.In this, part four of my series on working with datetime values, I'll explain how to use these two functions and provide examples of how they work.To demonstrate the functions, I used the following T-SQL code to create the Sales.Now, let's check out an UPDATE statement that uses the DATEADD function.In the following statements, I subtracted three days from the Deliv Date value and then displayed the results: This time, I used DATEADD in the SET clause -- I set Deliv Date to equal the results returned by the DATEADD function.Orders table, and then used a SELECT statement to retrieve that row: Notice that the VALUES clause includes a value for each column in the table.