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Query to list all stored procedures
...m my understanding the "preferred" method is to use the information_schema tables:
select *
from information_schema.routines
where routine_type = 'PROCEDURE'
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What is the difference between the kernel space and the user space?
...ine hardware (and everything else on the machine). To keep the machine as stable as possible, you normally want only the most trusted, well-tested code to run in kernel mode/kernel space.
The stack is just another part of memory, so naturally it's segregated right along with the rest of memory.
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map vs. hash_map in C++
....
hash_map (unordered_map in TR1 and Boost; use those instead) use a hash table where the key is hashed to a slot in the table and the value is stored in a list tied to that key.
map is implemented as a balanced binary search tree (usually a red/black tree).
An unordered_map should give slightly ...
data.table vs dplyr: can one do something well the other can't or does poorly?
I'm relatively familiar with data.table , not so much with dplyr . I've read through some dplyr vignettes and examples that have popped up on SO, and so far my conclusions are that:
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I want to copy table contained from one database and insert onto another database table
I want to copy a table's schema as well as the data within that table to another database table in another database on a live server. How could I do this?
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How to change the default collation of a table?
creates a table with the default collation latin1_general_ci ;
4 Answers
4
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C++使用OLE/COM高速读写EXCEL的源码 - C/C++ - 清泛网 - 专注C/C++及内核技术
...ColumnCount();
///使用某个shet，shit，shit
BOOL LoadSheet(long table_index,BOOL pre_load = FALSE);
///通过名称使用某个sheet，
BOOL LoadSheet(const TCHAR* sheet,BOOL pre_load = FALSE);
///通过序号取得某个Sheet的名称
CString GetSheetName(long table_index);
/...
How to declare a variable in a PostgreSQL query
... work as a variable, or even tuple of variables. It allows you to return a table of temporary values.
WITH master_user AS (
SELECT
login,
registration_date
FROM users
WHERE ...
)
SELECT *
FROM users
WHERE master_login = (SELECT login
FROM master_user)...
Linq to Sql: Multiple left outer joins
...se id that was passed in
from category
// left join on categories table if exists
in expenseDataContext.CategoryDtos
.Where(c => c.Id == expense.CategoryId)
.DefaultIfEmpty()
// left join on expense type table if exists
from ...
How do you find the row count for all your tables in Postgres
I'm looking for a way to find the row count for all my tables in Postgres. I know I can do this one table at a time with:
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