((SELECT ISNULL(columnName,CONVERT(DATETIME,'January 01,1900',101))) = CONVERT(DATETIME,'January 01,1900',101)) and columnName = null
[((SELECT ISNULL(columnName,CONVERT(DATETIME,'January 01,1900',101))) = CONVERT(DATETIME,'January 01,1900',101))] with [columnName = null]?
columnName IS NULL
var
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