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sql primary key and index
...ed in PRIMARY KEY, but allowed in UNIQUE index; and like in set operators (UNION, EXCEPT, INTERSECT), here NULL = NULL which means that you can have only one value as two NULLs are find as duplicates of each other;
only one PRIMARY KEY may exists per table while 999 unique indexes can be created
whe...
AJAX POST and Plus Sign ( + ) — How to Encode?
... and the plus sign (+) when i to try to save javascript "code examples" to mysql:
my solution (not the better way, but it works):
javascript:
function replaceAll( text, busca, reemplaza ){
while (text.toString().indexOf(busca) != -1)
text = text.toString().replace(busca,reemplaza);return text...
How can I get column names from a table in SQL Server?
...ry to get column name and all details without using
INFORMATION_SCHEMA in MySql :
SHOW COLUMNS FROM database_Name.table_name;
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Multi-line strings in PHP
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You forgot if I have loops or MySQL while loops between. Thanks
– TheBlackBenzKid
Mar 16 '12 at 20:40
93
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Floating elements within a div, floats outside of div. Why?
...is called out of flow if it is floated, absolutely
positioned, or is the root element.
Therefore, they don't impact surrounding elements as an in-flow element would.
This is explained in 9.5 Floats:
Since a float is not in the flow, non-positioned block boxes created
before and after the ...
Commenting code in Notepad++
...
From dev.mysql.com - From a “-- ” sequence to the end of the line. In MySQL, the “-- ” (double-dash) comment style requires the second dash to be followed by at least one whitespace or control character (such as a space, tab, ...
How to add Action Bar from support library into PreferenceActivity?
...ut in the first inflate call to: (ViewGroup) getWindow().getDecorView().getRootView()
– ahmedre
Nov 5 '14 at 7:47
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how to reference a YAML “setting” from elsewhere in the same YAML file?
...epetition bother you that much I suggest to make your application aware of root property and add it to every path that looks relative not absolute.
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How do you find the disk size of a Postgres / PostgreSQL table and its indexes
... where table_schema = 'public' and table_type = 'BASE TABLE'
union
-- materialized views
SELECT oid::regclass::text as table_name
FROM pg_class
WHERE relkind = 'm'
order by table_name
) AS all_tables
-- ORDER BY total_size DESC
order ...
SELECT INTO a table variable in T-SQL
...ce table as long as the CTE doesn't reference multiple tables using joins, unions , etc.
– nanestev
Apr 13 '18 at 14:11
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