Export Pervasive to MySQL (C#)
i’m looking for a way to export whole database from Pervasive 11, send it and import to MySQL server. I’ve tried to export it to xml file but i had problems with import it to MySQL. Any ideas?
database
Can’t find mysqladmin on Mac OSX 10.6.8
On a Mac, by default, mysql is installed to /usr/local/mysql/ The path to the binaries (mysql, mysqladmin, etc.) should therefore be /usr/local/mysql/bin
Can’t connect to MySQL server on ‘127.0.0.1’ (10061) (2003)
Looks like the mysql server is not started. Look to the official documentation of MySQL how you can start a service under windows. Install the server as a service using this command: C:> “C:\Program Files\MySQL\MySQL Server 5.5\bin\mysqld” –install
How to update multiple columns in single update statement in DB2
The update statement in all versions of SQL looks like: So, the answer is that you separate the assignments using commas and don’t repeat the set
Case statement in MySQL
Yes, something like this: As other answers have pointed out, MySQL also has the IF() function to do this using less verbose syntax. I generally try to avoid this because it is a MySQL-specific extension to SQL that isn’t generally supported elsewhere. CASE is standard SQL and is much more portable across different database engines, and I prefer to … Read more
Can’t connect to MySQL server on ‘127.0.0.1’ (10061) (2003)
Looks like the mysql server is not started. Look to the official documentation of MySQL how you can start a service under windows. Install the server as a service using this command: C:> “C:\Program Files\MySQL\MySQL Server 5.5\bin\mysqld” –install
What’s the difference between identifying and non-identifying relationships?
An identifying relationship is when the existence of a row in a child table depends on a row in a parent table. This may be confusing because it’s common practice these days to create a pseudokey for a child table, but not make the foreign key to the parent part of the child’s primary key. Formally, the “right” way … Read more
Why do we need “Relationships” between tables at all?
I think the main reason is for data integrity. If you have a relationship between two tables invoice and invoice_item. You won’t be able to add an invoice item that does not related to an invoice. This is what you want! It’s called referential integrity. It can get pretty messy in your database if you don’t have … Read more
What is “Advanced” SQL?
Basics SELECTing columns from a table Aggregates Part 1: COUNT, SUM, MAX/MIN Aggregates Part 2: DISTINCT, GROUP BY, HAVING Intermediate JOINs, ANSI-89 and ANSI-92 syntax UNION vs UNION ALL NULL handling: COALESCE & Native NULL handling Subqueries: IN, EXISTS, and inline views Subqueries: Correlated WITH syntax: Subquery Factoring/CTE Views Advanced Topics Functions, Stored Procedures, Packages Pivoting data: CASE & PIVOT syntax Hierarchical Queries Cursors: Implicit and Explicit Triggers Dynamic … Read more
What is this JavaScript “require”?
So what is this “require?” require() is not part of the standard JavaScript API. But in Node.js, it’s a built-in function with a special purpose: to load modules. Modules are a way to split an application into separate files instead of having all of your application in one file. This concept is also present in other languages … Read more