Big transactions cause the Tlog to grow.When you do a clean of a large table, the delete statement can cause a very long transactionSometimes it's necessary to prevent this.So we divide one big delete into several little ones.A table with call centre data gets +/- 1-mlj records a day. Every day we run a script […]
Assuming we have the following table (that stores hierarchical data) :CREATE TABLE [staff] ( [employee] [int] NOT NULL , [employee_name] [varchar] (10) NULL , [supervisor] [int] NULL , PRIMARY KEY CLUSTERED ( [employee] ) ON [PRIMARY] , FOREIGN KEY ( [supervisor] ) REFERENCES [staff] ( [employee] ))I ‘ll built a […]
This article shows you how to design the storage for email addresses, how to validate email addresses, how to retrieve demographic information from email addresses efficiently, using computed columns and indexes. It also covers the security aspect of dealing with email addresses.