mysql-5.6

How to select two columns having different conditions for each colums from MySQL Database?

依然范特西╮ 提交于 2019-12-02 23:04:16
问题 For example lets consider a table like: lets say i want to select two columns. Column one should contain all the names before 2019-09-11 and column two should contain all the names after 2019-09-11. So basically there would be two different where conditions for the two columns. expected output would be: MySQL version is 5.6.34-log IS there anyway to do so? 回答1: lets say i want to select two columns. Column one should contain all the names before 2019-09-11 and column two should contain all

How to select two columns having different conditions for each colums from MySQL Database?

拟墨画扇 提交于 2019-12-02 13:06:28
For example lets consider a table like: lets say i want to select two columns. Column one should contain all the names before 2019-09-11 and column two should contain all the names after 2019-09-11. So basically there would be two different where conditions for the two columns. expected output would be: MySQL version is 5.6.34-log IS there anyway to do so? lets say i want to select two columns. Column one should contain all the names before 2019-09-11 and column two should contain all the names after 2019-09-11. So basically there would be two different where conditions for the two columns.

Slow query after upgrade mysql from 5.5 to 5.6

混江龙づ霸主 提交于 2019-12-01 14:15:29
We're upgrading mysql from 5.5 to 5.6 and some queries are deadly slow now. Queries that took 0.005 seconds before are now taking 49 seconds. Queries on 5.6 are skipping the indexes, it seems: +----+-------------+-------+-------+----------------------------------------------------+---------+---------+------+--------+-------------+ | id | select_type | table | type | possible_keys | key | key_len | ref | rows | Extra | +----+-------------+-------+-------+----------------------------------------------------+---------+---------+------+--------+-------------+ | 1 | SIMPLE | pens | index | index

Slow query after upgrade mysql from 5.5 to 5.6

时光怂恿深爱的人放手 提交于 2019-12-01 11:30:57
问题 We're upgrading mysql from 5.5 to 5.6 and some queries are deadly slow now. Queries that took 0.005 seconds before are now taking 49 seconds. Queries on 5.6 are skipping the indexes, it seems: +----+-------------+-------+-------+----------------------------------------------------+---------+---------+------+--------+-------------+ | id | select_type | table | type | possible_keys | key | key_len | ref | rows | Extra | +----+-------------+-------+-------+---------------------------------------

2nd generation Google cloud SQL - App Engine

六月ゝ 毕业季﹏ 提交于 2019-12-01 05:23:30
Delighted to see that you have rolled out 2nd generation cloud SQL in Beta. However, I see that it is not available yet to GAE projects. Can you estimate when this link will be enabled please? We are making some big infrastructural changes in our fancy system necessitated by the slowness of Generation 1 SQL, but will stick with cloud SQL if the change is not far off. Cal S You can now connect to second generation Google Cloud SQL instances from App Engine apps. The connection string is slightly different from first generation instances (docs) . Open your SQL instance in the cloud console.

Changes to my.cnf don't take effect (Ubuntu 16.04, mysql 5.6)

五迷三道 提交于 2019-11-30 07:43:20
Changes I make to my.cnf don't seem to have any effect on the mysql environment. Here's a summary of what's happened... I installed mysql 5.7 on Ubuntu 16.04 but then realized I needed to downgrade to mysql 5.6 due to incompatibility issues. I apt purged the related applications and then removed any remaining directories such at /etc/mysql and /var/lib/mysql I then installed mysql-5.6 (server and client) and related packages. I was able to load one database from a dump from a server also running mysql 5.6 but when I tried to load a second database from a second dump from that same server, I

Changes to my.cnf don't take effect (Ubuntu 16.04, mysql 5.6)

时光怂恿深爱的人放手 提交于 2019-11-29 10:26:18
问题 Changes I make to my.cnf don't seem to have any effect on the mysql environment. Here's a summary of what's happened... I installed mysql 5.7 on Ubuntu 16.04 but then realized I needed to downgrade to mysql 5.6 due to incompatibility issues. I apt purged the related applications and then removed any remaining directories such at /etc/mysql and /var/lib/mysql I then installed mysql-5.6 (server and client) and related packages. I was able to load one database from a dump from a server also

What does the MySQL 5.6 error “InnoDB presently supports one FULLTEXT index creation at a time. Try LOCK=SHARED” mean?

跟風遠走 提交于 2019-11-28 04:51:07
问题 In MySQL 5.6.22 (specifically running on Amazon RDS) I once had a fulltext index on a table. I have since dropped that index in favor of using sphinxsearch. There are no more fulltext indexes on any of the tables on the database. When I try to now perform an online DDL such as adding a tinyint column to a table with LOCK=NONE I get this error: InnoDB presently supports one FULLTEXT index creation at a time. Try LOCK=SHARED. But, there are no fulltext indexes anywhere. I've even tried creating

MySQL 5.6 - DENSE_RANK like functionality without Order By

眉间皱痕 提交于 2019-11-28 02:09:29
I have a table like this: +------+-----------+ |caseID|groupVarian| +------+-----------+ |1 |A,B,C,D,E | +------+-----------+ |2 |A,B,N,O,P | +------+-----------+ |3 |A,B,N,O,P | +------+-----------+ |4 |A,B,C,D,F | +------+-----------+ |5 |A,B,C,D,E | +------+-----------+ I would like to get a new column nameVarian , such that same groupVarian values have same ranking represented by nameVarian (eg: v1, v2 and so on). However, nameVarian values assigned to a specific groupVarian should be as per the order of caseID (in the order they appear inside the table). The output should be something

How to solve mysql warning: “InnoDB: page_cleaner: 1000ms intended loop took XXX ms. The settings might not be optimal ”?

依然范特西╮ 提交于 2019-11-27 18:08:18
I ran a mysql import mysql dummyctrad < dumpfile.sql on server and its taking too long to complete. The dump file is about 5G. The server is a Centos 6, memory=16G and 8core processors, mysql v 5.7 x64- Are these normal messages/status "waiting for table flush" and the message InnoDB: page_cleaner: 1000ms intended loop took 4013ms. The settings might not be optimal mysql log contents 2016-12-13T10:51:39.909382Z 0 [Note] InnoDB: page_cleaner: 1000ms intended loop took 4013ms. The settings might not be optimal. (flushed=1438 and evicted=0, during the time.) 2016-12-13T10:53:01.170388Z 0 [Note]