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Semicolon before self-invoking function? [duplicate]
...eventing the ui tabs from working properly.
The error message was Invalid character in jquery.all.ui.js Line: 1. Char: 1.
I stumbled on the semi-colon completely by chance.
When I removed the ; from the ;(function($) it worked, seemingly without side-effects or loss of functionality.
I am using ...
Replace one substring for another string in shell script
...easily breaks on any nontrivial input string (irregular spacing, shell metacharacters, etc).
– tripleee
Jul 17 '18 at 16:54
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Get record counts for all tables in MySQL database
...get the count of rows in all tables in a MySQL database without running a SELECT count() on each table?
19 Answers
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MySQL “WITH” clause
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You might be interested in somethinkg like this:
select * from (
select * from table
) as Subquery
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Flatten an irregular list of lists
...s it fails with the cycle.. i think because a string is also an "array"-of-chars
– sten
Mar 20 '18 at 20:16
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COUNT(*) vs. COUNT(1) vs. COUNT(pk): which is better? [duplicate]
...for all your queries that need to count everything, even for joins, use *
SELECT boss.boss_id, COUNT(subordinate.*)
FROM boss
LEFT JOIN subordinate on subordinate.boss_id = boss.boss_id
GROUP BY boss.id
But don't use COUNT(*) for LEFT joins, as that will return 1 even if the subordinate table doe...
how to exclude null values in array_agg like in string_agg using postgres?
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SQL Fiddle
select
id,
(select array_agg(a) from unnest(canonical_users) a where a is not null) canonical_users,
(select array_agg(a) from unnest(non_canonical_users) a where a is not null) non_canonical_users
from (
SELE...
How to generate a random string in Ruby
I'm currently generating an 8-character pseudo-random uppercase string for "A" .. "Z":
50 Answers
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mysql -> insert into tbl (select from another table) and some default values [duplicate]
As the title says, I am trying to insert into one table selecting values from another table and some default values.
5 Ans...
SQL join: selecting the last records in a one-to-many relationship
... want to get a list of all customers along with their last purchase in one SELECT statement. What is the best practice? Any advice on building indexes?
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