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Fast way to discover the row count of a table in PostgreSQL
...bject Identifier Types.
Use to_regclass('myschema.mytable') in Postgres 9.4+ to avoid exceptions for invalid table names:
How to check if a table exists in a given schema
TABLESAMPLE SYSTEM (n) in Postgres 9.5+
SELECT 100 * count(*) AS estimate FROM mytable TABLESAMPLE SYSTEM (1);
Like @a_...
Call a function from another file?
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4
I tried this, but it is still showing the error: Has it got anything to do with Python 3, or is a general problem?
– D...
Very slow compile times on Visual Studio 2005
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34 Answers
34
Active
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dynamic_cast and static_cast in C++
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Mateusz Piotrowski
5,56688 gold badges4141 silver badges6666 bronze badges
answered Feb 12 '10 at 18:29
John DiblingJohn Dibling
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Why is a pure virtual function initialized by 0?
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answered Jan 28 '10 at 17:54
anonanon
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What is this weird colon-member (“ : ”) syntax in the constructor?
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TallChuck
68844 silver badges2020 bronze badges
answered Nov 10 '09 at 23:31
James McNellisJames McNellis
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How can I read large text files in Python, line by line, without loading it into memory?
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324
I provided this answer because Keith's, while succinct, doesn't close the file explicitly
with ...
SQL update query using joins
...turerID
WHERE im.mf_item_number like 'STA%' AND
gm.manufacturerID = 34
To make it clear... The UPDATE clause can refer to an table alias specified in the FROM clause. So im in this case is valid
Generic example
UPDATE A
SET foo = B.bar
FROM TableA A
JOIN TableB B
ON A.col1 = B.colx
WHERE ...
Is there a wikipedia API just for retrieve content summary?
...rop=extracts&exintro&explaintext&redirects=1&pageids=21721040
JSON Response
(warnings stripped)
{
"query": {
"pages": {
"21721040": {
"pageid": 21721040,
"ns": 0,
"title": "Stack Overflow",
"extra...
Whitespace Matching Regex - Java
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45
Yeah, you need to grab the result of matcher.replaceAll():
String result = matcher.replaceAll(...