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MongoDB with redis
...mediately send it back over to mongoose. There is no indices here, no full table scan, nothing.
We are doing a simple lookup to say has this query been executed? Yes? Okay, take the request and send it back immediately and don’t send anything to mongo.
We have the mongoose server, the cache serv...
Store select query's output in one array in postgres
...
SELECT array_agg(column_name::TEXT)
FROM information.schema.columns
WHERE table_name = 'aean'
The other is to use an array constructor:
SELECT ARRAY(
SELECT column_name
FROM information.schema.columns
WHERE table_name = 'aean')
I'm presuming this is for plpgsql. In that case you can assign i...
Generating random strings with T-SQL
...tes a random seed it associates with the test run (saves it in the results table), then passed along the seed, similar to this:
declare @seed int;
declare @string varchar(256);
select @seed = 1234; -- saved start seed
exec usp_generateIdentifier
@seed = @seed output
, @string = @string o...
Datatable vs Dataset
I currently use a DataTable to get results from a database which I can use in my code.
7 Answers
...
Adding placeholder text to textbox
...ered text. Seems like that would work better.
– DROP TABLE users
Dec 20 '13 at 22:49
6
This will ...
How to repeat a “block” in a django template
...his in more complex scenarios where I wanted to repeat the footer row of a table a the top. And the <tr> row was rather complex.
– caram
Dec 6 '19 at 11:36
add a comment...
How to split text without spaces into list of words?
Input: "tableapplechairtablecupboard..." many words
16 Answers
16
...
is of a type that is invalid for use as a key column in an index
...bytes even then so the safest maximum size for your keys would be:
create table [misc_info]
(
[id] INTEGER PRIMARY KEY IDENTITY NOT NULL,
[key] nvarchar(450) UNIQUE NOT NULL,
[value] nvarchar(max) NOT NULL
)
i.e. the key can't be over 450 characters. If you can switch to varchar i...
SQL - HAVING vs. WHERE
I have the following two tables:
8 Answers
8
...
What is SOA “in plain english”? [closed]
...ular, in a service-oriented architecture the parts generally don't share mutable state (global variables in a traditional program). Or if they do share state, that state is carefully locked up in a database which is itself an agent and which can easily manage multiple concurrent clients.
...