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LAST_INSERT_ID() MySQL
I have a MySQL question that I think must be quite easy. I need to return the LAST INSERTED ID from table1 when I run the following MySql query:
...
What is this operator in MySQL?
...ard and therefore supported on other databases, unlike <=>, which is MySQL-specific.
You can think of them as specialisations of MySQL's <=>:
'a' IS NULL ==> 'a' <=> NULL
'a' IS NOT NULL ==> NOT('a' <=> NULL)
Based on this, your particular query (fragment) can be c...
MySQL select 10 random rows from 600K rows fast
...imple, to gaps, to non-uniform with gaps.
http://jan.kneschke.de/projects/mysql/order-by-rand/
For most general case, here is how you do it:
SELECT name
FROM random AS r1 JOIN
(SELECT CEIL(RAND() *
(SELECT MAX(id)
FROM random)) AS id)
...
How do I list all files of a directory?
... os
# Getting the current work directory (cwd)
thisdir = os.getcwd()
# r=root, d=directories, f = files
for r, d, f in os.walk(thisdir):
for file in f:
if file.endswith(".docx"):
print(os.path.join(r, file))
os.listdir(): get files in the current directory (Python 2)
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Rails 3 execute custom sql query without a model
...
How about this :
@client = TinyTds::Client.new(
:adapter => 'mysql2',
:host => 'host',
:database => 'siteconfig_development',
:username => 'username',
:password => 'password'
sql = "SELECT * FROM users"
result = @client.execute(sql)
results.each d...
What are the best PHP input sanitizing functions?
...to the server. If you haven't worked with PDO before here's a pretty good MySQL-oriented tutorial.
Some SQL databases have their own specialty extensions in PHP, including SQL Server, PostgreSQL and SQLite 3. Each of those extensions has prepared statement support that operates in the same prepare...
Using a .php file to generate a MySQL dump
... done by the command itself.
That external command will :
be a call to mysqldump, with the right parameters,
and redirect the output to a file.
For example :
mysqldump --user=... --password=... --host=... DB_NAME > /path/to/output/file.sql
Which means your PHP code would look like this...
How to create a trie in Python
...; _end = '_end_'
>>>
>>> def make_trie(*words):
... root = dict()
... for word in words:
... current_dict = root
... for letter in word:
... current_dict = current_dict.setdefault(letter, {})
... current_dict[_end] = _end
... return ...
Getting “Lock wait timeout exceeded; try restarting transaction” even though I'm not using a transac
I'm running the following MySQL UPDATE statement:
17 Answers
17
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What is cardinality in MySQL?
What is cardinality in MySQL? Please explain in simple, non-technical language.
8 Answers
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