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How to concatenate columns in a Postgres SELECT?
...n any case.
For non-string data types, you can "fix" the 1st statement by casting at least one argument to text. (Any type can be cast to text):
SELECT a::text || b AS ab FROM foo;
Judging from your own answer, "does not work" was supposed to mean "returns NULL". The result of anything concatena...
Splitting string into multiple rows in Oracle
...error, '[^,]+', 1, levels.column_value)) as error
from
temp t,
table(cast(multiset(select level from dual connect by level <= length (regexp_replace(t.error, '[^,]+')) + 1) as sys.OdciNumberList)) levels
order by name
EDIT:
Here is a simple (as in, "not in depth") explanation of the que...
Any idea why I need to cast an integer literal to (int) here?
...
The compiler tries to subtract 128 from (Integer) instead of casting -128 to Integer. Add () to fix it
Integer i3 = (Integer) -128; // doesn't compile
Integer i3 = (Integer) (-128); // compiles
According to BoltClock in the comments the cast to int works as intended, because it is ...
json_decode to array
...
This is a late contribution, but there is a valid case for casting json_decode with (array).
Consider the following:
$jsondata = '';
$arr = json_decode($jsondata, true);
foreach ($arr as $k=>$v){
echo $v; // etc.
}
If $jsondata is ever returned as an empty string (as in my ...
Get value from SimpleXMLElement Object
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You have to cast simpleXML Object to a string.
$value = (string) $xml->code[0]->lat;
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How to check that a string is an int, but not a double, etc.?
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Cast it to int.
if it still have the same value its int;
function my_is_int($var) {
$tmp = (int) $var;
if($tmp == $var)
return true;
else
return false;
}
...
How to remove the querystring and get only the url?
... strrpos() in 'www.mydomain.com/myurl.html' will return 0 (FALSE casted to boolean to be more correct) so your substr will be empty. Use one: substr() OR parse_url() because using both makes no sense ;)
– veritas
Aug 7 '11 at 0:21
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Base64 encoding in SQL Server 2005 T-SQL
...-- Encode the string "TestData" in Base64 to get "VGVzdERhdGE="
SELECT
CAST(N'' AS XML).value(
'xs:base64Binary(xs:hexBinary(sql:column("bin")))'
, 'VARCHAR(MAX)'
) Base64Encoding
FROM (
SELECT CAST('TestData' AS VARBINARY(MAX)) AS bin
) AS bin_sql_server_temp;
-- De...
Cast to int vs floor
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Casting to an int will truncate toward zero. floor() will truncate toward negative infinite. This will give you different values if bar were negative.
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A non well formed numeric value encountered
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Casting won't fix the issue since PHP will automatically cast it when passed to the method.
– JohnP
May 26 '11 at 9:36
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