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Querying External Files With PolyBase

October 7, 2012
Pinal Dave
SQL Tips and Tricks
Cloud Computing, CSV, File format, SQL Server

PolyBase and SQL Server external tables expose CSV and Parquet files through schemas, while query plans show whether filters reduce remote work.

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Time Ago Labels: Showing ‘5 Minutes Ago’ From a Timestamp

October 6, 2012
Pinal Dave
SQL Tips and Tricks
Best Practices, SQL Performance, SQL Server

Learn time ago labels in SQL Server with practical examples, clear checks, common traps, and guidance for your own database.

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SARGable Date Filters: Stop Wrapping Columns in Functions

October 5, 2012
Pinal Dave
SQL Performance
SQL DateTime, SQL Function, SQL Index, SQL Performance, SQL Server

Write SARGable date filters as half-open ranges for years, months, days, and rolling windows, then compare plans and logical reads.

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SQL SERVER - Importance of User Without Login - T-SQL Demo Script

SQL SERVER – Importance of User Without Login – T-SQL Demo Script

October 4, 2012
Pinal Dave
SQL Tips and Tricks
SQL Scripts, SQL Server, SQL Server Security

A T-SQL demo script for a user without login: create the user, impersonate it, check its access, revert and then grant permissions, one step at a time.

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Renaming a Column Safely Everywhere It Is Used

October 1, 2012
Pinal Dave
SQL Tips and Tricks
Best Practices, SQL Column, SQL Server, SQL Stored Procedure, SQL View

Renaming a column safely requires finding SQL and application references, applying sp_rename, refreshing modules, and testing every consumer.

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SQL SERVER - Preserve Leading Zero While Coping to Excel from SSMS

SQL SERVER – Preserve Leading Zero While Coping to Excel from SSMS

September 30, 2012
Pinal Dave
SQL Tips and Tricks
Excel, SQL Function, SQL Server

Want to preserve leading zero values when you paste SSMS results into Excel? The fix is in Excel: format the cells as Text first, and the zeros stay.

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SQL SERVER – Importance of User Without Login

September 29, 2012
Pinal Dave
SQL Tips and Tricks
SQL Login, SQL Server, SQL Server Security

Some questions are very open ended. Here is one question I was asked in recent User Group Meeting about user without login.

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