Given the following
-- table ddl
create table dbo.f_word(
sentence_id int NULL,
sentence_word_id int NULL,
word_id int NULL,
lemma_id int NULL,
source_id int NULL,
part_of_speech_id int NULL,
person_id int NULL,
gender_id int NULL,
number_id int NULL,
ten...
I have the following table:
AddressId SubBuildingName BuildingName BuildingNumber Postcode
12345 Flat 1 SomeBuilding 80 MK34 1PU
12346 Flat 2 SomeBuilding 80 MK34 1PU
12347 Flat 7 OtherBuild...
Is there any performance benefit between the following two queries:
SELECT path FROM path WHERE name LIKE '%filename'
Or -
SELECT path FROM path WHERE name LIKE '%filename%'
What would be the difference in MySQL execution? And other than syntactic correctness, would there be any advantage t...
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Dolomedes /dɒləˈmiːdiːz/ is a genus of large spiders of the family Pisauridae. They are also known as fishing spiders, raft spiders, dock spiders or wharf spiders. Almost all Dolomedes species are semi-aquatic, with the exception of the tree-dwelling D. albineus of the southwestern United States. Many species have a striking pale stripe down each side of the body.
They hunt by waiting at the edge of a pool or stream, then when they detect the ripples from prey, they run across the surface to subdue it using their foremost legs, which are tipped with small claws; like other spiders they then inject...
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The thing about CHECK constraints is they only disallow rows for which the predicate returns FALSE. If the check returns UNKNOWN, that is not FALSE, so the row passes the check:
CREATE TABLE dbo.T1 (id int NULL CHECK (id = 1));
INSERT dbo.T1 VALUES (1); -- Ok
INSERT dbo.T1 VALUES (2); -- Error
...
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