
Explanation of Solution
Adding months to a date in Oracle:
- User can add the months to a date using “ADD_MONTHS” function in Oracle.
- Syntax of “ADD_MONTHS” function is,
ADD_MONTHS(Date, integer_value)
- From the given syntax, the “Date” represents a date time value and the “integer_value” represents the integer number.
Example:
The example of the “ADD_MONTHS” function in query concept is given below:
SELECT STUDENT_ID, ADD_MONTHS(EXAM_DATE, 2) AS MODIFIED_DATE;
The above query is used to display student ID and two months added exam date for each student from “STUDENT” table.
- From the given query, the “ADD_MONTHS” function is used to add two months for each exam date in the given “STUDENT” table and the added month is represented by “MODIFIED_DATE” using “AS” operator.
Adding months to a date in Access:
- User can add the months to a date using “DATEADD” function in SQL Server.
- Syntax of “DATEADD” function is,
DATEADD("interval", integer_value, date)
- The given syntax contains three arguments.
- The “interval” represents the interval of time to be added.
- If the user wants add a month to date, then interval will be specified by “m”, “mm” or “month”.
- For year, the interval will be specified by “year”, “yyyy” or “yy”.
- For day, the interval will be specified by “day”, “dy” or “y”.
- The “integer_value” represents the integer number.
- The “Date” represents a date time value.
- The “interval” represents the interval of time to be added.
Example:
The example of the “DATEADD” function in query concept is given below:
SELECT STUDENT_ID, DATEADD("m", 2, EXAM_DATE) AS MODIFIED_DATE;
The above query is used to display student ID and two months added exam date for each student from “STUDENT” table...
Explanation of Solution
Adding days to a date:
- User can add a number of days to a date without using any function.
- User can add the number of days to a given date by simply placing addition operator with given integer value.
Example:
The example for adding a number of days to a date...
Explanation of Solution
Compute the number of days between two dates:
User can compute the number of days between two ...

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Chapter 8 Solutions
A Guide to SQL
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