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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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Copy Data from One Table to Another in SQL Server: SQL in Sixty Seconds #031

October 31, 2012
Pinal Dave
SQL Video
SQL Constraint and Keys, SQL in Sixty Seconds, SQL Scripts, SQL Table Operation

To copy data from one table to another, use INSERT…SELECT for an existing table or SELECT…INTO for a new one. The tests here show what SELECT…INTO carries over and what it drops, the errors you can hit, and a quick way to check the copy.

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SQL query with incorrect order by clause.

SQL SERVER – UNION ALL and ORDER BY – How to Order Table Separately While Using UNION ALL

October 30, 2012
Pinal Dave
SQL Tips and Tricks
Best Practices

Two ORDER BY clauses in a UNION ALL give Msg 156. Here is how to use UNION ALL and ORDER BY together to sort the top and bottom sets separately.

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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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