![]() Counting the number of rows from one table that don’t have matches in another is a good safety check if there are any, you should think about using an outer join instead of an inner one. Real data often has gaps, and inner joins will discard records without warning you whenever keys don’t line up. Common problems with SQL joins Doing an inner SQL join instead of an outer join
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |