Rename a table in MySQL
Renaming a table is not working in MySQL The error message is The query is working fine on other tables for me, but not with the table group.
mysql
MySQL create table if not exists and insert record only if table was created
Combine the creation and insert into a single statement: If it doesn’t create the table, AS SELECT … clause is ignored.
MySQL Error “Operand should contain 1 column”
2 This question already has answers here: Operand Should Contain 1 Column – MySQL NOT IN (3 answers) Closed 7 years ago. I could find a lot of similar questions but no real solution for my problem. My SQL query: The error code I receive is If I just use the query in the parentheses … Read more
MySQL Error: : ‘Access denied for user ‘root’@’localhost’
Open and edit /etc/my.cnf or /etc/mysql/my.cnf, depending on your distribution. Add skip-grant-tables under [mysqld] Restart MySQL You should be able to log in to MySQL now using the below command mysql -u root -p Run mysql> flush privileges; Set new password by ALTER USER ‘root’@’localhost’ IDENTIFIED BY ‘NewPassword’; Go back to /etc/my.cnf and remove/comment skip-grant-tables Restart MySQL Now you will be able to login with the … Read more
Cannot add or update a child row: a foreign key constraint fails
You’re getting this error because you’re trying to add/update a row to table2 that does not have a valid value for the UserID field based on the values currently stored in table1. If you post some more code I can help you diagnose the specific cause.
MySQL “CREATE TABLE IF NOT EXISTS” -> Error 1050
Works fine for me in 5.0.27 I just get a warning (not an error) that the table exists;
Can’t connect to MySQL server on ‘localhost’ (10061) after Installation
this issue is very to solve by windows server users go to this path C:\Program Files\MySQL\MySQL Server 5.1\bin run this tool “MySQLInstanceConfig.exe” and config the instatnce again and problem solved
MySQL – Operand should contain 1 column(s)
Your subquery is selecting two columns, while you are using it to project one column (as part of the outer SELECT clause). You can only select one column from such a query in this context. Consider joining to the users table instead; this will give you more flexibility when selecting what columns you want from … Read more
What’s the difference between INNER JOIN, LEFT JOIN, RIGHT JOIN and FULL JOIN? [duplicate]
Reading this original article on The Code Project will help you a lot: Visual Representation of SQL Joins. Also check this post: SQL SERVER – Better Performance – LEFT JOIN or NOT IN?. Find original one at: Difference between JOIN and OUTER JOIN in MySQL.
ERROR 2002 (HY000): Can’t connect to local MySQL server through socket ‘/tmp/mysql.sock’
It’s probably because MySQL is installed but not yet running. To verify that it’s running, open up Activity Monitor and under “All Processes”, search and verify you see the process “mysqld”. You can start it by installing “MySQL.prefPane”. Here is the complete tutorial which helped me: http://obscuredclarity.blogspot.in/2009/08/install-mysql-on-mac-os-x.html