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TRY_PARSE() function result.

SQL SERVER – Denali – Conversion Function – TRY_PARSE() – A Quick Introduction

September 7, 2011
Pinal Dave
SQL Tips and Tricks
SQL Function, SQL Scripts

A quick introduction to the TRY_PARSE function in SQL Server Denali: it converts a string to a number or date, and returns NULL when it cannot.

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A coconut scraper extracts white shreds from a shell into a ceramic bowl

Converting XML Documents to JSON With FOR JSON PATH

September 7, 2011
Pinal Dave
SQL Tips and Tricks
Database, SQL Scripts, SQL Server

A partner asks for JSON from your XML export. Build the nested shape, decide what an empty order looks like, and avoid the escaped-array surprise.

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PostgreSQL SQL Query Result Window.

SQL SERVER – Denali – Conversion Function – PARSE() – A Quick Introduction

September 6, 2011
Pinal Dave
SQL Tips and Tricks
SQL Function, SQL Scripts

A quick introduction to the PARSE function in SQL Server Denali: convert a string to a number or a date and time, and see what happens when it fails.

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An unfinished clay cup sits beside a smooth finished cup on a potter's workbench.

What a Preview Build Is For, and What It Is Not

September 6, 2011
Pinal Dave
SQL Tips and Tricks
Best Practices, Database, SQL Scripts, SQL Server

Use a SQL Server preview to test specific features and report reproducible issues while keeping production data and recovery paths separate.

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A wide reading table with one large ledger open at the centre and reference volumes arranged around it

What Is a Data Warehouse?

September 5, 2011
Pinal Dave
SQL Tips and Tricks
Best Practices, Business Intelligence, Data Warehousing, Database

A data warehouse is built for questions, not transactions. Facts and dimensions in plain words, why the star schema reads the way people talk, what a date dimension is for, and when you do not need one.

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A citrus reamer and two orange halves beside a basket of untouched whole oranges

AT TIME ZONE Cost: Converting Many Rows Without Burning CPU

September 5, 2011
Pinal Dave
SQL Tips and Tricks
SQL Performance, SQL Scripts, SQL Server

Converting a whole column with AT TIME ZONE looks harmless on three rows and hurts on a hundred thousand. Here is the cheaper way to filter a local day.

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Tool window for executing SQL queries.

SQL SERVER – Tips from the SQL Joes 2 Pros Development Series – OpenXML Options – Day 35 of 35

September 4, 2011
Pinal Dave
SQL Tips and Tricks
Joes 2 Pros, SQL Scripts

OpenXML options explained: rowpattern recursion to search lower levels of your XML, and column patterns to reach one level higher, with a manager example.

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