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Cast List to List in .NET 2.0
...
.NET 2.0 has the ConvertAll method where you can pass in a converter function:
List<int> l1 = new List<int>(new int[] { 1, 2, 3 } );
List<string> l2 = l1.ConvertAll<string>(delegate(int i) { return i.ToString(); })...
How to export all data from table to an insertable sql format?
... PRINT ''*** ERROR ***''
SELECT OLEResult = @OLEResult, hr = CONVERT (binary(4), @hr), source = @source, description = @desc
Done:
';
-- '
EXEC (@PRC_WritereadFile)
EXEC PRC_WritereadFile 0 /*Create*/, '', @AsFileNAme, ''
;WITH steColumns AS (
...
Sqlite: CURRENT_TIMESTAMP is in GMT, not the timezone of the machine
...(timestamp, 'localtime')
That seems to work - is that the correct way to convert for your timezone, or is there a better way to do this?
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follo...
IEnumerable vs List - What to Use? How do they work?
...once. But is it better overall? Well in the above, Leopards and Hyenas get converted into single SQL queries each, and the database only returns the rows that are relevant. But if we had returned a List from AllSpotted(), then it may run slower because the database could return far more data than is...
SQL query to group by day
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actually this depends on what DBMS you are using but in regular SQL convert(varchar,DateColumn,101) will change the DATETIME format to date (one day)
so:
SELECT
sum(amount)
FROM
sales
GROUP BY
convert(varchar,created,101)
the magix number 101 is what date format it is con...
Generate a random number in the range 1 - 10
...: select (trunc(random() * 10) % 10) + 1
The output from trunc has to be converted to INTEGER. But it can be done without trunc. So it turns out to be simple.
select (random() * 9)::INTEGER + 1
Generates an INTEGER output in range [1, 10] i.e. both 1 & 10 inclusive.
For any number (floats)...
How do I escape a reserved word in Oracle?
... it graciously allows omitting the double-quotes, in which case it quietly converts the identifier to uppercase:
SELECT MyColumn AS MyColAlias
FROM MyTable Alias
WHERE ThisCol = 'That Value';
gets internally converted to something like:
SELECT "ALIAS" . "MYCOLUMN" AS "MYCOLALIAS"
FROM "THEUSER" ...
How to convert an IPv4 address into a integer in C#?
I'm looking for a function that will convert a standard IPv4 address into an Integer. Bonus points available for a function that will do the opposite.
...
Which MySQL datatype to use for an IP address? [duplicate]
...has exactly 4 bytes:
`ipv4` INT UNSIGNED
And INET_ATON and INET_NTOA to convert them:
INSERT INTO `table` (`ipv4`) VALUES (INET_ATON("127.0.0.1"));
SELECT INET_NTOA(`ipv4`) FROM `table`;
For IPv6 addresses you could use a BINARY instead:
`ipv6` BINARY(16)
And use PHP’s inet_pton and inet_...
How to change the default charset of a MySQL table?
... to a new character set, use a statement like this:
ALTER TABLE tbl_name CONVERT TO CHARACTER SET charset_name;
So query will be:
ALTER TABLE etape_prospection CONVERT TO CHARACTER SET utf8;
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