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How to list active / open connections in Oracle?
Is there any hidden table, system variable or something to show active connections in a given moment?
9 Answers
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Default height for section header in UITableView
I want to set the height of the first header in my UITableView. For the other headers I want them to remain the default height. What value/constant can I put in place of "someDefaultHeight" in the code below?
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Why does NULL = NULL evaluate to false in SQL server
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@NeilMcGuigan That's true if for data that has its own table, but what about data that's represented in a column? Wouldn't you use 'null' to represent the fact that the data doesn't exist? 'Not known' is a very specific reason for the data being absent.
– Ri...
MySQL复制的概述、安装、故障、技巧、工具 - 数据库(内核) - 清泛网 - 专注...
...--master-data=1 > data.sql
注：master-data选项缺省会打开lock-all-tables，并写入CHANGE MASTER TO语句。
如果数据库使用的是InnoDB表类型的话，则应该使用single-transcation：
shell> mysqldump --all-databases --single-transaction --master-data=1 > data.sql
有了...
How to 'bulk update' with Django?
I'd like to update a table with Django - something like this in raw SQL:
5 Answers
5
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How to set default values in Rails?
... If you know you'll always want that default value for that column on that table, setting them in a DB migration file is the easiest way:
class SetDefault < ActiveRecord::Migration
def self.up
change_column :people, :last_name, :type, :default => "Doe"
end
def self.down
# You c...
Using a custom image for a UITableViewCell's accessoryView and having it respond to UITableViewDeleg
I'm using a custom drawn UITableViewCell, including the same for the cell's accessoryView . My setup for the accessoryView happens by the way of something like this:
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c# datatable to csv
...of HTML/XML documents. It's not the above code that produces it unless the table contains &nbsp; explicitly
– vc 74
Mar 15 '19 at 16:50
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How do I make text bold in HTML?
... it within your CSS ("legend {font-weight: bold;}").
Want to distinguish a table caption from the table it captions? Use a "caption" element and suggest a bold style for it within your CSS ("caption {font-weight: bold;}").
Want to distinguish table headings from table data cells? Use a "th" element ...
spring boot default H2 jdbc connection (and H2 console)
...erties and start with mvn spring:run. I can see hibernate JPA creating the tables but if I try to access the h2 console at the URL below the database has no tables.
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