Convert varchar to datetime in sql which is having millisec

Question

I have a column abc varchar(100) with data like 2011-09-26 16:36:57.810000

I want to convert this column to DATETIME...

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Answer 1

Assuming we have the following string variables:

DECLARE @d VARCHAR(100)  = '2020-04-06T04:35:07.9490051Z' -- 7 digits nanoseconds
DECLARE @d1 VARCHAR(100) = '2020-04-05T15:00:00Z'         -- simple: without nanoseconds

I came up to the solution using CAST operator:

SELECT CAST(LEFT(@d,19) + 'Z' AS DATETIME)  -- outputs: 2020-04-06 04:35:07.000
SELECT CAST(LEFT(@d1,19) + 'Z' AS DATETIME) -- outputs: 2020-04-05 15:00:00.000