大约有 45,000 项符合查询结果（耗时：0.0253秒） [XML]
Get size of all tables in database
...
SELECT
t.NAME AS TableName,
s.Name AS SchemaName,
p.rows,
SUM(a.total_pages) * 8 AS TotalSpaceKB,
CAST(ROUND(((SUM(a.total_pages) * 8) / 1024.00), 2) AS NUMERIC(36, 2)) AS TotalSpaceMB,
SUM(a.used_pa...
Return positions of a regex match() in Javascript?
Is there a way to retrieve the (starting) character positions inside a string of the results of a regex match() in Javascript?
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How can I get column names from a table in SQL Server?
... much more by querying the Information Schema views.
This sample query:
SELECT *
FROM INFORMATION_SCHEMA.COLUMNS
WHERE TABLE_NAME = N'Customers'
Can be made over all these DB objects:
CHECK_CONSTRAINTS
COLUMN_DOMAIN_USAGE
COLUMN_PRIVILEGES
COLUMNS
CONSTRAINT_COLUMN_USAGE
CONSTRAINT_...
How to find a hash key containing a matching value
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You could use Enumerable#select:
clients.select{|key, hash| hash["client_id"] == "2180" }
#=> [["orange", {"client_id"=>"2180"}]]
Note that the result will be an array of all the matching values, where each is an array of the key and value.
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How do you use variables in a simple PostgreSQL script?
...c/sql-do.html )
DO $$
DECLARE v_List TEXT;
BEGIN
v_List := 'foobar' ;
SELECT *
FROM dbo.PubLists
WHERE Name = v_List;
-- ...
END $$;
Also you can get the last insert id:
DO $$
DECLARE lastid bigint;
BEGIN
INSERT INTO test (name) VALUES ('Test Name')
RETURNING id INTO lastid;
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How can I get this ASP.NET MVC SelectList to work?
I create a selectList in my controller, to display in the view.
23 Answers
23
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SQL query for finding records where count > 1
...ers that have more than one payment per day with the same account number
SELECT
user_id ,
COUNT(*) count
FROM
PAYMENT
GROUP BY
account,
user_id ,
date
Having
COUNT(*) > 1
Update
If you want to only include those that have a distinct ZIP you can get a distinct set first and then perfor...
Split large string in n-size chunks in JavaScript
I would like to split a very large string (let's say, 10,000 characters) into N-size chunks.
22 Answers
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How to get CSS to select ID that begins with a string (not in Javascript)?
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The specificity of this type of selector is very low
– nuander
Sep 3 '15 at 21:24
3
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How to convert QString to std::string?
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That's true - I was thinking about const char *x = qs.ToUtf8().constData(). Still, isn't it easier to just call qs.toStdString()?
– Vitali
Dec 6 '11 at 14:36
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