大约有 40,000 项符合查询结果（耗时：0.0237秒） [XML]
Real life example, when to use OUTER / CROSS APPLY in SQL
...ORDER BY pr.name) pa
ORDER BY pr.name,
pa.name
2) Calling a Table Valued Function for each row in the outer query
SELECT *
FROM sys.dm_exec_query_stats AS qs
CROSS APPLY sys.dm_exec_query_plan(qs.plan_handle)
3) Reusing a column alias
SELECT number,
doubled_number,
...
Can table columns with a Foreign Key be NULL?
I have a table which has several ID columns to other tables.
7 Answers
7
...
Pass Array Parameter in SqlCommand
...arameters[i], items[i]);
}
cmd.CommandText = string.Format("SELECT * from TableA WHERE Age IN ({0})", string.Join(", ", parameters));
cmd.Connection = new SqlConnection(connStr);
UPDATE: Here is an extended and reusable solution that uses Adam's answer along with his suggested edit. I improved it...
In Django - Model Inheritance - Does it allow you to override a parent model's attribute?
... Not sure why this is the accepted answer... OP is using multi-table inheritance. This answer is only valid for abstract base classes.
– MrName
Mar 12 '18 at 21:39
1
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Difference between assertEquals and assertSame in phpunit?
...te objects match their attribute values in any case. So it's the method suitable for asserting object match.
$this->assertEquals($expected, $actual); PASSES
https://phpunit.de/manual/current/en/appendixes.assertions.html
...
MYSQL import data from csv using LOAD DATA INFILE
...
You can use LOAD DATA INFILE command to import csv file into table.
Check this link MySQL - LOAD DATA INFILE.
LOAD DATA LOCAL INFILE 'abc.csv' INTO TABLE abc
FIELDS TERMINATED BY ','
ENCLOSED BY '"'
LINES TERMINATED BY '\r\n'
IGNORE 1 LINES
(col1, col2, col3, col4, col5...);
For...
What is the “N+1 selects problem” in ORM (Object-Relational Mapping)?
...
SELECT
table1.*
, table2.*
INNER JOIN table2 ON table2.SomeFkId = table1.SomeId
That gets you a result set where child rows in table2 cause duplication by returning the table1 results for each child row in table2. O/R mappers sho...
Entity Framework Code First - two Foreign Keys from same table
...his answer, however it makes the Foreign Key columns nullable in the Match table.
– RobHurd
Aug 21 '16 at 14:41
This w...
how to make a whole row in a table clickable as a link?
...like this (in a document.ready callback):
$("#container").on('click-row.bs.table', function (e, row, $element) {
window.location = $element.data('href');
});
This has the advantage of not being reset upon table sorting (which happens with the other option).
Note
Since this was posted window.do...
Position of least significant bit that is set
...how to squeeze some cycles out of it?" makes such an answer perfectly acceptable!
– Mehrdad Afshari
Apr 16 '09 at 17:08
5
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