CTE and joins begin Day 16 of the original interview series. The ten questions remain with corrected examples and clearer answers about XML, CLR, synonyms, and locking.
Interview Questions and Answers – FAQ Day 14 of 31
FAQ Day 14 of my interview series starts with the basic functions of the master, msdb, model, tempdb and resource databases in SQL Server 2008.
Interview Questions and Answers – Frequently Asked Questions Day 6 of 31
Frequently Asked Questions Day 6: which TCP/IP port SQL Server runs on and how to change it, and the difference between a clustered and a non-clustered index.
SQL SERVER – Find Details for Statistics of Whole Database
Need statistics of whole database in one view? My script uses DMVs instead of the deprecated sp_helpstats and shows each stat, column and last update.
CROSS JOIN: Duplicate Inputs Multiply the Result
CROSS JOIN multiplies row counts, including repeated labels. Keep source identifiers and grouped pair counts visible while checking result grain.
SQL SERVER – Puzzle Involving NULL – Resolve – Error – Operand data type void type is invalid for sum operator
SELECT SUM over a lone NULL throws Msg 8117: Operand data type void type is invalid for sum operator. Here is why it happens and how ISNULL fixes it.
Tabular Models for the SQL Developer
Tabular models for the SQL developer add relationships, measures, security, and reusable semantics above SQL tables; learn when a view is enough.