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15 wrz 2008 · See working demo: if then without case in SQL Server. For start, you need to work out the value of true and false for selected conditions. Here comes two NULLIF: for true: ISNULL(NULLIF(p.[Instock], 'Y'), 1) for false: ISNULL(NULLIF(p.[Instock], 'N'), 0) combined together gives 1 or 0. Next use bitwise operators.
This edition of SQL Practice Problems assumes that you have some basic background knowledge about relational databases and tables. However, I’ve added some beginner level questions to gradually introduce the various parts of the SQL Select statement for those with less experience in SQL.
12 wrz 2022 · Learn how to build conditional logic when writing SQL code using IF, BEGIN, END, ELSE, and ELSEIF logic.
1 cze 2021 · Standard SQL Functions Cheat Sheet. TEXT FUNCTIONS. CONCATENATION. Use the || operator to concatenate two strings: SELECT 'Hi ' || 'there!'; -- result: Hi there! Remember that you can concatenate only character strings using ||. Use this trick for numbers: SELECT '' || 4 || 2; -- result: 42.
17 wrz 2024 · In this article, we’ve provided 12 SQL functions practice questions, complete with solutions and explanations. If you enjoy this article, check out our comprehensive SQL Practice track; you can try the first few exercises for free!
24 maj 2021 · The IF…ELSE structure will execute a certain block of code if a specified condition is TRUE, and a different block of code if that condition is FALSE. Here is the basic layout and syntax of the IF…ELSE structure: IF(<condition is true>) BEGIN <execute some code> END ELSE BEGIN <execute some different code> END
29 sie 2024 · SQL Query Questions and Answers for Practice. We recommend you go through the questions and build queries by yourself. Try to find answers on your own. However, you need to set up the sample tables and test data. We have provided simple SQL scripts to seed the test data. Use those first to create the test database and tables.
