![]() ![]() To connect to Excel or text files using the legacy connection, connect to the file, and in the Open dialog box, click the Open drop-down menu, and then select Open with Legacy Connection. Though there are several common reasons why you might use custom SQL, you can use custom SQL to union your data across tables, recast fields to perform cross-database joins, restructure or reduce the size of your data for analysis, etc.įor Excel and text file data sources, this option is available only in workbooks that were created before Tableau Desktop 8.2 or when using Tableau Desktop on Windows with the legacy connection. However, using custom SQL can be useful when you know exactly the information you need and understand how to write SQL queries. ![]() Because databases have slightly different SQL syntax from each other, the custom SQL you use to connect to one database might be different from the custom SQL you might use to connect to another. The Code Page to use is 65001 (which usually means UTF-8 with Byte Order Mark, but I am not sure if SQL Server requires the Byte Order Mark in these cases).To a specific query rather than the entire data set. Please note that for anyone using BCP.exe, BULK INSERT, or OPENROWSET(BULK.), this option only became available starting in SQL Server 2016. (it sounds like you have already done this).Ĭontinue exporting the file using the UTF-8 encoding, but change how the file is being read into SQL Server by specifying that it is encoded as UTF-8. Then, either you or your import process, lower-cased the à (probably because it was in the middle of a word) which is how you ended up with: Nãºmero.Įncode the file as (Extended) ASCII using Code 2 (as it is exported), and do not change how it is being read into SQL Server. When those two bytes are read by something expecting Code 2, they are interpreted as being à ( 0xC3 on Code 2 ) and º ( 0xBA on Code 2 ). The ú ( U+00FA ) is encoded as two bytes in UTF-8: 0xC3 and 0xBA. Then, either you or your import process, lower-cased the à (probably because it was in the middle of a word) which is how you ended up with: Usuã¡rio. When those two bytes are read by something expecting Code 2, they are interpreted as being à ( 0xC3 on Code 2 ) and ¡ ( 0xA1 on Code 2 ). The á ( U+00E1 ) is encoded as two bytes in UTF-8: 0xC3 and 0xA1. However, the accented characters are not 1 byte in UTF-8: This is one of the reasons that UTF-8 is so popular. This is why some characters transferred between systems as expected: N (upper-case Latin "N") is 0x4E in UTF-8 as well as in Code 2 (in fact, it's 0x4E across all 8-bit Code Pages supported by SQL Server). ![]() Code Points above that range take 2 - 4 bytes. The first 128 Code Points (U+0000 - U+007F), which contain the US English alphabet, all use 1 byte. UTF-8 is a multi-byte encoding: it uses a different number of bytes depending on the character being encoded.
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