You'll also learn how to: Explore relational databases, including lightweight and centralized models Use SQLite and SQLiteStudio to create lightweight databases in minutes Query and transform data in meaningful ways by using SELECT, WHERE, GROUP BY, and ORDER BY Join tables to get a more complete view of your business data Build your own tables and centralized databases by using normalized design principles Manage data by learning how to INSERT, DELETE, and UPDATE records Not only will you learn how to use key SQL statements to find and manipulate your data, but you'll also discover how to efficiently design and manage databases to meet your needs. Author Thomas Nield provides exercises throughout the book to help you practice your newfound SQL skills at home, without having to use a database server environment. You will quickly master the fundamentals of SQL and learn how to create your own databases. If you're a business or IT professional, this short hands-on guide teaches you how to pull and transform data with SQL in significant ways. Run SELECT count(sqlmodded) Operating systemĪrch Linux 6.4.2-arch1-1, KDE Plasma.Businesses are gathering data today at exponential rates and yet few people know how to access it meaningfully. Steps to reproduceĭefine and use trigger as outlined above. Then SQLiteStudio throws the error: Error while executing SQL query on database 'qnap': 1st ORDER BY term out of range - should be between 1 and 1.ĭoing exactly the same with DB Browser for SQLite Version 3.12.2 does not throw an error. However, after running an update query if you rerun SELECT count(sqlmodded) The trigger continues to behave correctly, incrementing sqlmodded as appropriate. If I open the table in SQLiteStudio and run the following it returns the number of records that do not have NULL in sqlmodded: SELECT count(sqlmodded)Īll of the above works as intended, until I run an update query. SET sqlmodded = iif(sqlmodded IS NULL, '1', (CAST (sqlmodded AS INTEGER) + 1) ) The trigger is as follows: CREATE TRIGGER IF NOT EXISTS sqlmods The table is populated using external source data and in all instances sqlmodded will be NULL on populating the table. I have a table containing a field sqlmodded which is updated by the trigger set out below. If this is a feature request, delete this section. I checked and made sure that no other column's checkbox was ticked in the "Define Columns to sort by" dialog, so it looks like the inputs into this dialog box are getting lost or misinterpreted somewhere along the way. The results were refreshed, but the data was still sorted by the wrong column. Views have no inherent sort order, so I just clicked on the column I want results to be sorted by, then chose "Define Columns to Sort By" and chose the column I wanted, and checked the ASC box. I downloaded the latest nightly build of SQLiteStudio to try out and found that this view now shows results sorted by a different column. In the past, my results for a particular view came out sorted by that column. For some reason, I am no longer able to sort by any column.
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