I ran into this same problem with HeidiSQL. The error you receive is very cryptic. My problem ended up being that the foreign key column and the referencing column were not of the same type or length. The foreign key column was SMALLINT(5) UNSIGNED and the referenced column was INT(10) UNSIGNED. Once I made them both the same … Read more
I have installed MySQL server and trying to connect to it, but getting the error: I have checked my /tmp directory and there is no mysql.sock. I can’t find mysql.sock anywhere. I read that it might be in But I checked there as well and there is even no mysql directory, only some postfix thing … Read more
I found the reason why the connection was not working, it was because the connection was trying to connect to port 8888, when it needed to connect to port 8889. This fixed the problem, although changing the server name to localhost still gives the error. Connection failed: SQLSTATE[HY000] [2002] No such file or directory But … Read more
I am facing problem with mysql non root/admin user, I am following the below steps for creating user and its privileges, correct me if i am doing wrong, i am installing mysql on RHEL 5.7 64bit, packages are mentioned below, once i done the rpm install we are creating mysql db using mysql_install_db, then starting the mysql service then using mysql_upgrade also we … Read more
The criteria expression is the part of the query containing the conditions, as in WHERE <condition>. Look at those specifically. The error message means you’re comparing two things (this equals that, or this less than that, etc.) that are of two different, and incompatible types (comparing a number to a string, for example). You can find … Read more
You’re going to want to add Python to your Path Environment Variable in this way. Go to: My Computer System Properties Advance System Settings Under the “Advanced” tab click the button that says “Environment Variables” Then under System Variables you are going to want to add / change the following variables: PYTHONPATH and Path. Here is a paste … Read more
Try: Check MySQL Options. Note 1: It is better to use the full path of the SQL file file.sql. Note 2: Use -R and –triggers to keep the routines and triggers of original database. They are not copied by default. Note 3 You may have to create the (empty) database from MySQL if it doesn’t exist already and the exported SQL don’t contain CREATE DATABASE (exported … Read more
You need to enable it. Check out the Permission section of the xp_cmdshell MSDN docs: http://msdn.microsoft.com/en-us/library/ms190693.aspx:
The image below helps show the differences between B+ trees and B trees. Advantages of B+ trees: Because B+ trees don’t have data associated with interior nodes, more keys can fit on a page of memory. Therefore, it will require fewer cache misses in order to access data that is on a leaf node. The … Read more
|| represents string concatenation. Unfortunately, string concatenation is not completely portable across all sql dialects: ansi sql: || (infix operator) mysql: concat ( vararg function ). caution: || means ‘logical or’ (It’s configurable, however; thanks to @hvd for pointing that out) oracle: || (infix operator), concat ( caution: function of arity 2 only ! ) postgres: || (infix operator) sql server: + (infix operator), concat ( vararg function ) sqlite: || (infix operator) hopefully the confusion is complete … Read more