Months Between

[mets19]

Hi, I am trying to determine the amount of months between today and a
date stored in the database. But I cannot seem to figure out get the
difference between the two dates. Thanks in advance.

[Plamen Ratchev]

You can use the DATEDIFF function to calculate period of time between dates.
Here is example for months:

CREATE TABLE Foo (mydate DATETIME)

INSERT INTO Foo VALUES ('20010106')
INSERT INTO Foo VALUES ('20020506')
INSERT INTO Foo VALUES ('20070901')
INSERT INTO Foo VALUES ('20071201')
INSERT INTO Foo VALUES ('20080101')

SELECT DATEDIFF(month, mydate, CURRENT_TIMESTAMP)
FROM Foo

HTH,

Plamen Ratchev
http://www.SQLStudio.com

[Erland Sommarskog]

Plamen Ratchev (Pl****@SQLStudio.com) writes:

You can use the DATEDIFF function to calculate period of time between
dates.
Here is example for months:

CREATE TABLE Foo (mydate DATETIME)

INSERT INTO Foo VALUES ('20010106')
INSERT INTO Foo VALUES ('20020506')
INSERT INTO Foo VALUES ('20070901')
INSERT INTO Foo VALUES ('20071201')
INSERT INTO Foo VALUES ('20080101')

SELECT DATEDIFF(month, mydate, CURRENT_TIMESTAMP)
FROM Foo

For mets19 we should point out that datediff counts the number of cross
boundaries, so datediff(MONTH, '20080131', '200800201') returns 1, which
may or may not be what you want.
--
Erland Sommarskog, SQL Server MVP, es****@sommarskog.se

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