Figure 1 is useful and correct as the first of 4 colourings of intersecting circle Venn diagrams for: (INNER) JOIN vs LEFT, RIGHT & FULL (OUTER) JOIN but not vs CROSS JOIN. Intersection …

A cross join performs a cartesian product on the tuples of the two sets. SELECT * FROM Table1 CROSS JOIN Table2 Which circumstances render such an SQL operation particularly useful?

16 Stumbled upon this post from another SO question, but a big difference is the linkage cross join creates. For example using cross apply or another join after B on the first ('comma') …

Jul 12, 2010 · A CROSS JOIN produces a cartesian product between the two tables, returning all possible combinations of all rows. It has no ON clause because you're just joining everything …

CROSS APPLY has its obvious usage in allowing a set to depend on another (unlike the JOIN operator), but that doesn't comes without a cost: it behaves like a function that operates over …

Jan 20, 2014 · Cross Join. From A cross join B is produces the cartesian product A × B. Each A will be repeated once for every B. If A has 100 rows and B has 100 rows, the result set will …

A LATERAL join is more like a correlated subquery, not a plain subquery, in that expressions to the right of a LATERAL join are evaluated once for each row left of it - just like a correlated …

One thing to note is a cross join will result in an empty table if one of the tables is empty. If one of your tables might be empty and you still want records, you may want an outer join (e.g. left, …

The query inside CROSS APPLY can reference the outer table, where INNER JOIN cannot do this (throws compile error). When finding the last two dates, joining is done inside CROSS …

Mar 29, 2018 · A CROSS JOIN is used to create a cartesian product, you don't use an ON clause with it. Edit: you could use a WHERE clause, however then the CROSS JOIN implicitly …