[MSDN Library June 1998] Unknown Values: IS NULL and IS NOT NULL (25.6847319347319%)

MSDN Library Visual Studio 6.0 > Platform SDK > Database and Messaging Services > Microsoft SQL Server Programmer's Toolkit > Database Developer's Companion > Chapter 4 Retrieving Data with Queries > Creating Basic Queries > Selecting Rows: The WHERE Clause

[MSDN Library June 1998] Unknown column (24.6769496769497%)

MSDN Library Visual Studio 6.0 > Visual Studio Documentation > Data Access Tools and Technologies > Microsoft Visual Database Tools > Interface Reference > Troubleshooting Error Messages > Query Designer Troubleshooting Errors

[MSDN Library June 1998] Unknown Error - 20038 (24.1434491434491%)

MSDN Library Visual Studio 6.0 > Visual SourceSafe Documentation > Reference Guide > Error Messages

[MSDN Library June 1998] Unknown automation error (23.8458300958301%)

MSDN Library Visual Studio 6.0 > Visual SourceSafe Documentation > Reference Guide > Error Messages

[MSDN Library June 1998] Unknown User Types (23.5852110852111%)

MSDN Library Visual Studio 6.0 > Platform SDK > COM and ActiveX Object Services > COM > COM Clients and Servers

[MSDN Library September 1992] Unknown Function psrch with Brief Emulation in PWB (20.3362193362193%)

Knowledge Base and Bug Lists > Programmer's WorkBench KBase