大约有 19,000 项符合查询结果（耗时：0.0254秒） [XML]
How does the vim “write with sudo” trick work?
...ve probably seen the command that allows you to write on a file that needs root permission, even when you forgot to open vim with sudo:
...
PowerShell Script to Find and Replace for all Files with a Specific Extension
... the equivalent for Set-Content for it to handle files that weren't at the root.
– Matt Whitfield
Sep 28 '19 at 9:41
add a comment
|
...
How to test an SQL Update statement before running it?
...What about Transactions? They have the ROLLBACK-Feature.
@see https://dev.mysql.com/doc/refman/5.0/en/commit.html
For example:
START TRANSACTION;
SELECT * FROM nicetable WHERE somthing=1;
UPDATE nicetable SET nicefield='VALUE' WHERE somthing=1;
SELECT * FROM nicetable WHERE somthing=1; #check
CO...
SQL select only rows with max value on a column [duplicate]
...
I know that MySQL allows you to add non aggregate fields to a "grouped by" query, but I find that kinda pointless. Try running this select id, max(rev), rev from YourTable group by id and you see what I mean. Take your time and try to un...
How do I select an entire row which has the largest ID in the table?
...show profiles and it appears our solutions have the same performance using MySQL. For my own knowledge, do you know what DBMS has poorer performance for subselects?
– unutbu
Feb 7 '14 at 20:08
...
How to use JNDI DataSource provided by Tomcat in Spring?
...
auth="Container"
type="javax.sql.DataSource"
driverClassName="com.mysql.jdbc.Driver"
url="jdbc:mysql://localhost:3306/TestDB"
username="pankaj"
password="pankaj123"
maxActive="100"
maxIdle="20"
minIdle="5"
maxWait="10000"/>
back to context.xml de spring add this
...
scp (secure copy) to ec2 instance without password
... arguments in the wrong order. This works:
scp -i mykey.pem somefile.txt root@my.ec2.id.amazonaws.com:/
share
|
improve this answer
|
follow
|
...
Spring Boot - Cannot determine embedded database driver class for database type NONE
...
spring.datasource.url = jdbc:mysql://localhost/abc #spring.datasource.driverClassName = com.mysql.jdbc.Driver spring.datasource.name=olabsenglishdb spring.datasource.username=xxxx spring.datasource.password=xxxx spring.datasource.driver-class-name= com.m...
Best way to work with dates in Android SQLite [closed]
...
Usually (same as I do in mysql/postgres) I stores dates in int(mysql/post) or text(sqlite) to store them in the timestamp format.
Then I will convert them into Date objects and perform actions based on user TimeZone
...
MongoDB with redis
...od results. A company well-known for running MongoDB and Redis (along with MySQL and Sphinx) is Craiglist. See this presentation from Jeremy Zawodny.
MongoDB is interesting for persistent, document oriented, data indexed in various ways. Redis is more interesting for volatile data, or latency sensi...