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

Based on GBrian's answer, I came up with:

CONVERT(DATETIME, CONVERT(DATETIME2, abc, 126))

I haven't benchmarked how this stacks up against the substring-based solutions.