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Are there disadvantages to using a generic varchar(255) for all text-based fields?
...single-byte content (e.g. ascii or latin1 characters). And likewise utf8mb4 character set causes the string to pad out to four bytes per character in memory.
So a VARCHAR(255) in utf8 storing a short string like "No opinion" takes 11 bytes on disk (ten lower-charset characters, plus one byte for l...
How to do something to each file in a directory with a batch script
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yoel halb
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answered Oct 7 '08 at 22:51
Franci PenovFranci Penov
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SQL server query to get the list of columns in a table along with Data types, NOT NULL, and PRIMARY
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487
To avoid duplicate rows for some columns, use user_type_id instead of system_type_id.
SELECT ...
Is there an easy way to return a string repeated X number of times?
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answered Sep 20 '10 at 19:14
Ahmad MageedAhmad Mageed
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How to center absolute div horizontally using CSS?
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414
You need to set left: 0 and right: 0.
This specifies how far to offset the margin edges from ...
On Duplicate Key Update same as insert
...natively, you can use:
INSERT INTO table (id,a,b,c,d,e,f,g)
VALUES (1,2,3,4,5,6,7,8)
ON DUPLICATE KEY
UPDATE a=a, b=b, c=c, d=d, e=e, f=f, g=g;
To get the id from LAST_INSERT_ID; you need to specify the backend app you're using for the same.
For LuaSQL, a conn:getlastautoid() fetches the va...
How to specify the private SSH-key to use when executing shell command on Git?
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edited Nov 22 '16 at 20:42
Nick T
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answered D...
Replace multiple whitespaces with single whitespace in JavaScript string
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edited Apr 10 '19 at 11:49
vsync
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answere...
Find full path of the Python interpreter?
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answered Apr 7 '10 at 2:54
ImranImran
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Using .text() to retrieve only text not nested in child tags
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Jonathan Arbely
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answered Jan 13 '12 at 13:45
DotNetWalaDotNetWala
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