Today I received a request from an application owner who wanted to know the size of all the CLOB and BLOB columns in all the non-system tables so that they have a good idea of the size involved for a migration. Tables with BLOB/CLOB columns The SQL to find the tables with the BLOB/CLOB columns … Continue reading Oracle: Find The Total Size Of All Of Your CLOB & BLOB Columns In All Tables
Update Sep 7, 2018: This article uses deprecated commands. Please checkout this blog post on "Alter Index Vs DBCC IndexDefrag Vs DBCC DBReIndex". In the newer versions, I prefer ALTER INDEX although it has not been good at defragmenting in all cases. A good defrag script is worth its weight in gold. This time, I copied … Continue reading SQL Server: Identify And Defragment Indexes Using DBCC SHOWCONTIG & DBCC INDEXDEFRAG
Requirement: Recently I got a request from a user that he wanted to copy a specific set of tables and their indexes into a new database to ship to the vendor for analysis. The problem was that the DB had thousands of tables (8,748 to be precise). Hunting and pecking for specific tables from that … Continue reading PowerShell – Copy SQL Server Tables – Structure, Data & Indexes To Another Database/Instance
Today, as I was working with a table and I needed to find the “archived” version of the table. Typically, the archive table would have a name with “Archive” suffixed to the actual table name. Since I could not find the archive table by just matching on the table name, I had to improvise. I … Continue reading SQL Server – Find Tables With Similar Table Structure
Same SQL written in 3 different ways “There are a thousand ways to skin a cat” or so they say. Let us look at just three ways of writing the same SQL and build the case for using the USING clause. The query below is to get the current Oracle session’s effective “parallel” related parameter … Continue reading Oracle – Simplify Your Joins – Using “USING” In JOIN Clause?!