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Walking Foreign Key Chains to Find a Safe Delete Order

November 3, 2012
Pinal Dave
SQL Tips and Tricks
CTE, SQL Constraint and Keys, SQL Delete, SQL Server

Map foreign key chains from a parent table with a recursive catalog query, then list deepest children first and flag cascade rules.

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SQL SERVER - Function to Round Up Time to Nearest Minute Interval

SQL SERVER – Function to Round Up Time to Nearest Minute Interval

November 2, 2012
Pinal Dave
SQL Tips and Tricks
SQL DateTime, SQL Function, SQL Scripts, SQL Server

A small T-SQL function that rounds a datetime up or down to the nearest minute interval you pass in, with the code and how to call it.

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Identity Overflow Check: How Close Is Each INT Column to 2,147,483,647

November 1, 2012
Pinal Dave
SQL Tips and Tricks
SQL Identity, SQL Scripts, SQL Server

A table with few rows can still be one insert away from error 8115. Here is a check that shows the real headroom of every INT identity column.

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Finding the Error Log Folder and Other Paths From T-SQL

October 29, 2012
Pinal Dave
SQL Tips and Tricks
SQL Scripts, SQL Server, SQL Server Management Studio

Pasted a server path into File Explorer and found nothing? The folder is on the server, not your laptop. Here are the queries that tell you where.

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SQL SERVER - Move Database Files MDF and LDF to Another Location

SQL SERVER – Move Database Files MDF and LDF to Another Location

October 28, 2012
Pinal Dave
SQL Tips and Tricks
SQL Backup and Restore, SQL Scripts, SQL Server, Transaction Log

Your new database sits in the default location and keeps growing. Here is how to move the MDF and LDF database files to another disk or drive.

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Gapless Invoice Numbers That Restart Every Year

October 25, 2012
Pinal Dave
SQL Tips and Tricks
SQL Scripts, SQL Server, SQL Transactions

Finance hates a missing invoice number. A small counter table and one short transaction keep the numbers gapless and restart them each year.

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SQL SERVER - Order By Numeric Values Formatted as String

SQL SERVER – Order By Numeric Values Formatted as String

October 23, 2012
Pinal Dave
SQL Tips and Tricks
SQL Server, SQL String

A column holds alphanumeric values that start with a number, and ORDER BY sorts them as text. Here is how to sort the rows by the Numeric part instead.

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