大约有 40,000 项符合查询结果(耗时:0.0311秒) [XML]

https://stackoverflow.com/ques... 

“query function not defined for Select2 undefined error”

Trying to use Select2 and getting this error on multiple item input/text field: 13 Answers ...
https://stackoverflow.com/ques... 

How do I calculate tables size in Oracle

...BLE_NAME FORMAT A32 COLUMN OBJECT_NAME FORMAT A32 COLUMN OWNER FORMAT A10 SELECT owner, table_name, TRUNC(sum(bytes)/1024/1024) Meg, ROUND( ratio_to_report( sum(bytes) ) over () * 100) Percent FROM (SELECT segment_name table_name, owner, bytes FROM dba_segments WHERE segment_type IN...
https://stackoverflow.com/ques... 

SQL - find records from one table which don't exist in another

...shortest statement, and may be quickest if your phone book is very short: SELECT * FROM Call WHERE phone_number NOT IN (SELECT phone_number FROM Phone_book) alternatively (thanks to Alterlife) SELECT * FROM Call WHERE NOT EXISTS (SELECT * FROM Phone_book WHERE Phone_book.phon...
https://stackoverflow.com/ques... 

How can I get the list of a columns in a table for a SQLite database?

...(first_name varchar, last_name varchar, email_address varchar); sqlite> select * from sqlite_master; table|people|people|2|CREATE TABLE people (first_name varchar, last_name varchar, email_address varchar) To get column information you can use the pragma table_info(table_name) statement: sqlit...
https://stackoverflow.com/ques... 

PostgreSQL - max number of parameters in “IN” clause?

... explain select * from test where id in (values (1), (2)); QUERY PLAN Seq Scan on test (cost=0.00..1.38 rows=2 width=208) Filter: (id = ANY ('{1,2}'::bigint[])) But if try 2nd query: explain select * from test where id = an...
https://stackoverflow.com/ques... 

LINQ to SQL - Left Outer Join with multiple join conditions

...g.Where(f => f.otherid == 17).DefaultIfEmpty() where p.companyid == 100 select f.value Or you could use a subquery: from p in context.Periods join f in context.Facts on p.id equals f.periodid into fg from fgi in (from f in fg where f.otherid == 17 select f).DefaultIfE...
https://stackoverflow.com/ques... 

HTML input file selection event not firing upon selecting the same file

Is there any chance to detect every file selection the user made for an HTML input of type file element? 7 Answers ...
https://stackoverflow.com/ques... 

System.Net.Http: missing from namespace? (using .net 4.5)

... Add Reference dialog right-click on your project in Solution Explorer and select Add Reference.... It should look something like: share | improve this answer | follow ...
https://stackoverflow.com/ques... 

Better techniques for trimming leading zeros in SQL Server?

... Why don't you just cast the value to INTEGER and then back to VARCHAR? SELECT CAST(CAST('000000000' AS INTEGER) AS VARCHAR) -------- 0 share | improve this answer | ...
https://stackoverflow.com/ques... 

Function to Calculate Median in SQL Server

... in all cases. It also requires SQL 2012 or later. DECLARE @c BIGINT = (SELECT COUNT(*) FROM dbo.EvenRows); SELECT AVG(1.0 * val) FROM ( SELECT val FROM dbo.EvenRows ORDER BY val OFFSET (@c - 1) / 2 ROWS FETCH NEXT 1 + (1 - @c % 2) ROWS ONLY ) AS x; Of course, just because o...