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What is the string concatenation operator in Oracle?
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It is ||, for example:
select 'Mr ' || ename from emp;
The only "interesting" feature I can think of is that 'x' || null returns 'x', not null as you might perhaps expect.
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How can I get the current user's username in Bash?
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On the command line, enter
whoami
or
echo "$USER"
To save these values to a variable, do
myvariable=$(whoami)
or
myvariable=$USER
Of course, you don't need to make a variable since that is what the $USER variable is for.
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How can I find out what FOREIGN KEY constraint references a table in SQL Server?
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Here it is:
SELECT
OBJECT_NAME(f.parent_object_id) TableName,
COL_NAME(fc.parent_object_id,fc.parent_column_id) ColName
FROM
sys.foreign_keys AS f
INNER JOIN
sys.foreign_key_columns AS fc
ON f.OBJECT_ID = fc.constra...
Vim: How to change the highlight color for search hits and quickfix selection
... background for highlighting search hits. The same pattern is used for the selected entry in the quickfix window.
3 Answers...
How to compare two NSDates: Which is more recent?
I am trying to achieve a dropBox sync and need to compare the dates of two files. One is on my dropBox account and one is on my iPhone.
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Minimum and maximum value of z-index?
...r>) or
real number values (denoted by
<number>). Real numbers and
integers are specified in decimal
notation only. An <integer>
consists of one or more digits "0" to
"9". A <number> can either be an
<integer>, or it can be zero or
more digits followed by a ...
Git keeps asking me for my ssh key passphrase
...ed keys as instructed in the github tutorial, registered them with github, and tried using ssh-agent explicitly — yet git continues to ask me for my passphrase every time I try to do a pull or a push.
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Does free(ptr) where ptr is NULL corrupt memory?
...believe it's safe to assume free(NULL) is a nop as per instructed by the standard.
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What is the best collation to use for MySQL with PHP? [closed]
...ng utf8_general_ci.
MySQL will not distinguish between some characters in select statements, if the utf8_general_ci collation is used. This can lead to very nasty bugs - especially for example, where usernames are involved. Depending on the implementation that uses the database tables, this problem...
Change Placeholder Text using jQuery
... Note for OP: Also note that the change event is hooked to the select box, not the text input. $('#serMemdd').change(function () {
– Benjam
Feb 10 '12 at 18:51
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