Question: How to Map Network Drive as Fixed Drive in SQL Server?
love little problems like this one as they are indeed a lot of fun to resolve.
Table Variable Deferred Compilation: Before and After SQL Server 2019
Compare table variable deferred compilation at compatibility levels 140 and 150, then decide when a temporary table gives better estimates.
SQL SERVER – SQL Azure Managed Instance Restore Error – The Database Was Backed Up on a Server Running Version 15.00.2000
One of my clients migrated to SQL Azure Managed Instance and contacted me for an interesting situation. Let us resolve Restore Error.
ISNUMERIC Function Returns 1 for 12e5: What to Use Instead
The ISNUMERIC function returns 1 for strings that are not plain numbers, such as 12e5, a lone dollar sign and a lone plus. This post shows what it accepts, why, and which tests to use instead. It covers TRY_CAST and its blank string quirk, TRY_PARSE, and the digit pattern checks readers suggest.
Parameter Sniffing Fixes Compared: Which One to Use
Parameter sniffing fixes compared on one table show a clear order, from a cheap guess to a better index. This post runs the plain procedure, a local variable, OPTIMIZE FOR UNKNOWN, a scoped setting, OPTION (RECOMPILE) and a covering index on the same skewed table, and prints the page reads of each in both call orders.
OPTION (RECOMPILE) Hint: When a Fresh Plan Pays Off
The OPTION (RECOMPILE) hint tells SQL Server to build a new plan every time a statement runs. This post measures the page reads it saves on skewed data, the compile cost it adds, the filtered index it unlocks, and how to apply it to one statement of a procedure.
Database Scoped Configuration: Turn Off Parameter Sniffing
A database scoped configuration lets you turn off parameter sniffing for one database with a single statement. This post measures a procedure with the setting on and off, shows that the change clears the cached plans of the database, and explains what the switch does not fix.