Comments (5)
INITIAL SUPPORT FOR INNER AND LEFT JOIN
(INNER) JOIN: Returns records that have matching values in both tables
SELECT first_name AS fn
FROM staff AS s1
JOIN students AS s2
ON s2.mentor_id = s1.staff_num;
or
SELECT column_name(s)
FROM table1
INNER JOIN table2
ON table1.column_name = table2.column_name;
LEFT (OUTER) JOIN: Returns all records from the left table, and the matched records from the right table
SELECT column_name(s)
FROM table1
LEFT JOIN table2
ON table1.column_name = table2.column_name;
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SELECT * FROM table_1 JOIN table_2 USING (key_A)"
is the same as
SELECT * FROM table_1 JOIN table_2 ON table_1.key_A = table_2.key_A
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INNER JOIN _ ON _ written, only LEFT JOIN remains to be written
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LEFT (OUTER) JOIN
Repeat rows in the LEFT relation when they match multiple in the RIGHT, if there's no match in the RIGHT, return the LEFT with NULLs in the RIGHT.
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CROSS, INNER and LEFT joins written
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Related Issues (20)
- ✨ push predicates into subqueries
- 🪲 random appears to be evaluated once
- 🧹 HOUSEKEEPING
- ✨ Execute with call back
- 🪲 Errors in Buffer Pool
- 🪲 memcached test failure
- 🧹 node performance
- 🪲 Subscripts not named correctly, name clashes when more than one in same query
- ✨ dynamically write and compile operators
- ✨ fuse operators
- ✨ parallelize readers (GCS first)
- ✨ Cythonize the Memory Pool HOT 1
- 🪲 memory pool should have a "copy" accessor
- ✨ setting memcache should gracefully fail - and not try again
- 🪲 inner join bug
- 🪲 pyarrow reads are not threadsafe
- 🧹 Fetch GCS blob lists per day, reduce number of calls. HOT 1
- ✨ support Nimble
- 🪲 GCS blob lists are truncated at 1000 items (GCS API page limit)
- ✨ Bound functions and Late bound decorators causes Pickle issues when multiprocessing. HOT 1
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