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In PostgreSQL, you can calculate the date of birth from a full age by using the AGE() function along with the current date. The AGE() function returns the difference between two dates as an interval, which can then be used to calculate the date of birth.
For example, you can get the date of birth from a full age of 30 years by subtracting 30 years from the current date. This can be achieved by using the following query:
SELECT current_date - interval '30 years' AS date_of_birth;
This query will return the date of birth that corresponds to a full age of 30 years. You can adjust the age value in the interval clause to get the date of birth for different full ages.
How to convert age to birth date using PostgreSQL functions?
To convert an age to a birth date using PostgreSQL functions, you can use the age function in combination with the current_date function. Here is an example query that demonstrates how to do this:
SELECT current_date - INTERVAL '30 years' AS birth_date;
In this query, we are subtracting 30 years from the current date to get the birth date of a person who is 30 years old. You can replace the 30 years with the age you want to convert to a birth date.
Alternatively, you can use the DATE_TRUNC function to get a more precise birth date based on the age. Here is an example query:
SELECT DATE_TRUNC('year', current_date) - INTERVAL '30 years' AS birth_date;
This query will truncate the current date to the beginning of the year and then subtract 30 years to get a birth date. You can adjust the age and date truncation unit as needed for your specific use case.
How to extract birth date from age in PostgreSQL using SQL?
To extract birth date from age in PostgreSQL using SQL, you first need to find the current date and subtract the age from the current date to calculate the birth date. Here is a sample SQL query to achieve this:
SELECT CURRENT_DATE - INTERVAL '30 years' AS birth_date;
In this query, '30 years' is the age being subtracted from the current date to calculate the birth date. You can replace '30 years' with any other age value as needed.
What is the correct syntax for getting birth date from age in PostgreSQL?
In PostgreSQL, you can get the birth date from age using the following syntax:
SELECT CURRENT_DATE - INTERVAL '25 years' AS birth_date;
This will return the birth date of a person who is 25 years old. You can replace '25 years' with the age you want to calculate the birth date for.
How to transform full age to birth date in PostgreSQL?
To transform a full age (interval) value to a birth date in PostgreSQL, you can use the following query:
SELECT CURRENT_DATE - INTERVAL '30 years' AS birth_date;
In this query, the INTERVAL value represents the full age you want to convert to a birth date. You can replace '30 years' with any other full age interval as needed.
This query will calculate the birth date by subtracting the desired full age interval from the current date in PostgreSQL.
How to derive birth date from age in PostgreSQL?
To derive a birth date from an age in PostgreSQL, you can use the following query:
SELECT current_date - interval '1 year' * age AS birth_date FROM your_table_name;
In this query, age is the column that stores the age of the person. The query calculates the birth date by subtracting the age in years from the current date.
Make sure to replace your_table_name with the actual name of your table.