大约有 47,000 项符合查询结果(耗时:0.0268秒) [XML]

https://stackoverflow.com/ques... 

PostgreSQL Crosstab Query

... - not fit for missing attributes crosstab(text) with 1 input parameter: SELECT * FROM crosstab( 'SELECT section, status, ct FROM tbl ORDER BY 1,2' -- needs to be "ORDER BY 1,2" here ) AS ct ("Section" text, "Active" int, "Inactive" int); Returns: Section | Active | Inacti...
https://stackoverflow.com/ques... 

How to show disable HTML select option in by default?

... a drop-down menu from the mysql table and hard-coded too. I have multiple select in my page, One of them is 11 Answers ...
https://stackoverflow.com/ques... 

How to retrieve the current value of an oracle sequence without increment it?

... SELECT last_number FROM all_sequences WHERE sequence_owner = '<sequence owner>' AND sequence_name = '<sequence_name>'; You can get a variety of sequence metadata from user_sequences, all_sequences and dba_...
https://stackoverflow.com/ques... 

MySQL Great Circle Distance (Haversine formula)

...ults. To search by kilometers instead of miles, replace 3959 with 6371. SELECT id, ( 3959 * acos( cos( radians(37) ) * cos( radians( lat ) ) * cos( radians( lng ) - radians(-122) ) + sin( radians(37) ) * sin(radians(lat)) ) ) AS distance FROM markers HAVING distance < 25 ORDER BY distance ...
https://stackoverflow.com/ques... 

There is no ListBox.SelectionMode=“None”, is there another way to disable selection in a listbox?

How do I disable selection in a ListBox? 16 Answers 16 ...
https://stackoverflow.com/ques... 

MySQL Query to select data from last week?

Hi I have a table with a date field and some other information. I want to select all entries from the past week, (week start from Sunday). ...
https://stackoverflow.com/ques... 

Remove an entire column from a data.frame in R

...=4:6) to remove just the a column you could do Data <- subset( Data, select = -a ) and to remove the b and d columns you could do Data <- subset( Data, select = -c(d, b ) ) You can remove all columns between d and b with: Data <- subset( Data, select = -c( d : b ) As I said above...
https://stackoverflow.com/ques... 

SQL query to select dates between two dates

... you should put those two dates between single quotes like.. select Date, TotalAllowance from Calculation where EmployeeId = 1 and Date between '2011/02/25' and '2011/02/27' or can use select Date, TotalAllowance from Calculation where EmployeeId = 1 and Da...
https://stackoverflow.com/ques... 

Get record counts for all tables in MySQL database

...get the count of rows in all tables in a MySQL database without running a SELECT count() on each table? 19 Answers ...
https://stackoverflow.com/ques... 

How do I get the current time zone of MySQL?

...bal and client-specific time zones can be retrieved like this: mysql> SELECT @@global.time_zone, @@session.time_zone; Edit The above returns SYSTEM if MySQL is set to slave to the system's timezone, which is less than helpful. Since you're using PHP, if the answer from MySQL is SYSTEM, you ca...