Imagine you have a configuration table like the following: CREATE TABLE rule ( name VARCHAR2(50) NOT NULL PRIMARY KEY, enabled NUMBER(1) DEFAULT 1 NOT NULL CHECK (enabled IN (0,1)), priority NUMBER(10) DEFAULT 0 NOT NULL, flag1 NUMBER(3) DEFAULT 0 NOT NULL, flag2 NUMBER(3) DEFAULT 0 NOT NULL, flag3 NUMBER(3) DEFAULT 0 NOT NULL, flag4 NUMBER(3) … Continue reading Using UNPIVOT to Traverse a Configuration Table’s Rows and Columns
Tag: normalisation
Say NO to Excessive Use of Surrogate Keys if Performance Really Matters to You
We programmers keep cargo culting these wrong ideas. Recently, we said "NO" to Venn diagrams. Today we're going to say no to surrogate keys. The surrogate keys vs. natural keys non-debate is one of the most overheated debates in data architecture, and I don't get why everyone is so emotional. Both sides claim to hold … Continue reading Say NO to Excessive Use of Surrogate Keys if Performance Really Matters to You