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Create new user in MySQL and give it full access to one database
... - This is the command used to create users and grant rights to databases, tables, etc.
ALL PRIVILEGES - This tells it the user will have all standard privileges. This does not include the privilege to use the GRANT command however.
dbtest.* - This instructions MySQL to apply these rights for use ...
Design Pattern for Undo Engine
...e object is needed, you lookup the current definition of the object from a table. The table contains a linked list for each object that contains all the previous versions, along with information regarding which checkpoint they were active for.
Implementing undo/redo is simple: Do your action and es...
Count number of records returned by group by
... count(*) RecordsPerGroup,
COUNT(*) OVER () AS TotalRecords
from temptable
group by column_1, column_2, column_3, column_4
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IN vs OR in the SQL WHERE Clause
...tion Plan.
I tried it with Oracle, and it was exactly the same.
CREATE TABLE performance_test AS ( SELECT * FROM dba_objects );
SELECT * FROM performance_test
WHERE object_name IN ('DBMS_STANDARD', 'DBMS_REGISTRY', 'DBMS_LOB' );
Even though the query uses IN, the Execution Plan says that it u...
Can I position an element fixed relative to parent? [duplicate]
...cases. It is currently a working draft, and has decent support, aside from table elements. position: sticky still needs a -webkit prefix in Safari.
See caniuse for up-to-date stats on browser support.
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Why do we use arrays instead of other data structures?
...1000 compared to getting to P4.
Higher level data structures, such as hashtables, stacks and queues, all may use an array (or multiple arrays) internally, while Linked Lists and Binary Trees usually use nodes and pointers.
You might wonder why anyone would use a data structure that requires linear...
win7 安装项目管理工具redmine2.5.1 - 开源 & Github - 清泛网 - 专注C/C++及内核技术
...服务
b. 然后在my.ini文件中的[mysqld]下面一行添加skip_grant_tables (加上这句话，my.ini一般在mysql的data目录）
c. 再次输入mysql -u root -p ,这时cmd将切换成mysql模式
输入: UPDATE user SET Password=PASSWORD('newpassword') where USER='root';（注意...
MySQL root access from all hosts
...on a remote Ubuntu machine. The root user is defined in the mysql.user table this way:
9 Answers
...
Escape Character in SQL Server
... instead of doing
DECLARE @SQL NVARCHAR(1000)
SET @SQL = 'SELECT * FROM MyTable WHERE Field1 = ''AAA'''
EXECUTE(@SQL)
try this:
DECLARE @SQL NVARCHAR(1000)
SET @SQL = 'SELECT * FROM MyTable WHERE Field1 = @Field1'
EXECUTE sp_executesql @SQL, N'@Field1 VARCHAR(10)', 'AAA'
...
Differences between Perl and PHP [closed]
...han @foo or %foo.
(related to the previous point) Perl has separate symbol table entries for scalars, arrays, hashes, code, file/directory handles and formats. Each has its own namespace.
Perl gives access to the symbol table, though manipulating it isn't for the faint of heart. In PHP, symbol table...