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VARCHAR vs. CHAR if the column has mostly NULLs?
Sorry if this is a FAQ. I Googled and searched the forum before posting, but couldn't find an answer, specifically re: large number of NULLS.
My table has ~ 3M records. I have a column that SAS has automatically created as VARCHAR(2)
My table has ~ 3M records. I have a column that SAS has automatically created as VARCHAR(2)
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