Please forgive my title; if you have a suggestion for it, feel free to comment. I have a database: DROP TABLE IF EXISTS `books`; CREATE TABLE `books` ( `isbn` VARCHAR(255) NOT NULL, `title` ...
I'm reviewing an SQL Server 2008R2 installation having large performance problems. Currently I'm looking into its indexes and foreign keys and have found out that none of the tables have any foreign ...
Current Situation We have a table called c with ca. 300,000 rows. In this table we store the competitors for a specific product. Example: id | competitors | some infos about competitor | ...
Will there be any difference in performance if you compare a query fetching data via a join between two tables where there's a relationship against either of the following: A primary key A unique ...
I am designing a table in Teradata with about 30 columns. These columns are going to need to store several time-interval-style values such as Daily, Monthly, Weekly, etc. It is bad design to store ...
Sorry, if this is naive question, but I searched a lot and did not get a vivid answers. Consider a simple InnoDB FOREIGN KEY without ON DELETE or ON UPDATE I think this will avoid INSERT of a value ...