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- What exactly does the . join () method do? - Stack Overflow
I'm pretty new to Python and am completely confused by join() which I have read is the preferred method for concatenating strings I tried: strid = repr(595) print array array('c', random sample(
- SQL JOIN where to place the WHERE condition? - Stack Overflow
1 For INNER JOIN any condition can be in a WHERE instead of an ON as long as there is no intervening OUTER JOIN 2 When moving a LEFT JOIN condition from an ON to a WHERE the performance is irrelevant since (as you say) in general the result differs 3 That difference does not in general "transform the OUTER JOIN into an INNER JOIN" –
- What is a SQL JOIN, and what are the different types?
Note that a JOIN without any other JOIN keywords (like INNER, OUTER, LEFT, etc) is an INNER JOIN In other words, JOIN is a Syntactic sugar for INNER JOIN (see: Difference between JOIN and INNER JOIN )
- LEFT JOIN vs. LEFT OUTER JOIN in SQL Server - Stack Overflow
LEFT OUTER JOIN - fetches data if present in the left table RIGHT OUTER JOIN - fetches data if present in the right table FULL OUTER JOIN - fetches data if present in either of the two tables CROSS JOIN, as the name suggests, does n times m pairings that join everything
- sql - JOIN two SELECT statement results - Stack Overflow
Currently achieving this using the two select statement method with a LEFT JOIN (as opposed to the suggested INNER JOIN, which works but doesn't show persons with no late tasks because they don't exist in the second SELECT Also achieving this with the late column being SUM(CASE WHEN Age > Palt THEN 1 ELSE 0 END) Late –
- What is the difference between JOIN and UNION? - Stack Overflow
The SQL JOIN clause is used to combine records from two or more tables in a database A JOIN is a means for combining fields from two tables by using values common to each The SQL UNION operator combines the result of two or more SELECT statements Each SELECT statement within the UNION must have the same number of columns
- SQL Server Left Join With Or Operator - Stack Overflow
Here is what I did in the end, which got the execution time down from 52 secs to 4 secs SELECT * FROM ( SELECT tpl *, a MidParentAId as 'MidParentId', 1 as 'IsMidParentA' FROM TopLevelParent tpl INNER JOIN MidParentA a ON a TopLevelParentId = tpl TopLevelParentID UNION SELECT tpl *, b MidParentBId as 'MidParentId', 0 as 'IsMidParentA' FROM TopLevelParent tpl INNER JOIN MidParentB b ON b
- Can I use CASE statement in a JOIN condition? - Stack Overflow
A CASE expression returns a value from the THEN portion of the clause You could use it thusly: SELECT * FROM sys indexes i JOIN sys partitions p ON i index_id = p index_id JOIN sys allocation_units a ON CASE WHEN a type IN (1, 3) AND a container_id = p hobt_id THEN 1 WHEN a type IN (2) AND a container_id = p partition_id THEN 1 ELSE 0 END = 1
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