You’ll also see that these anti-patterns stem from performance concerns and that, besides the “manual” approach to improving SQL queries, you can analyze your queries also in a more structured, in-depth way b
I seem to have problems when I try to Nest "Select Case(s)" in Access/SQL... Can it be done; is there a specific syntax to do it? This is what I am trying to accomplish...Select Case Me.[RecordSource] Copy Case 0 Case 1 Case 2 Select Case Me.[DataType] Case X Case Y ...
CASE WHEN in SQL operates very similarly to “if then” statements in other programming languages. Replace the “if” with CASE WHEN and “else if” with WHEN, and the rest matches: Note: CASE WHEN statements will always output new values to a new column which is different than “if then...
In order to write a test case, one must have the requirements to derive inputs along with the test scenarios so that none of the features get missed out. Also, the test case template should be followed to maintain uniformity among the test cases. This makes it easy to report the defects...
When you write Passthrough SQL statements and Range Where clauses in Dexterity, make sure that the Transact SQL code is compatible with all regional settings and sort orders. Also, make sure that field values that are passed to Microsoft SQL Server are handled correctly. You can use the follo...
“Write the query the simplest way. If through testing it becomes clear that the performance is inadequate, consider alternative query forms.”- Gail Shaw For fast, accurate and documented assistance in answering your questions, please readthis article. ...
7 rows in set (0.00 sec) Say you have to run this query on a regular basis. This could become tedious to have to write out the query repeatedly, especially when it comes to longer and more complex query statements Also, if you had to make slight tweaks to the query or expand on it...
To learn how to write an SQL query, let's use the following question: Who are the people with red hair in Massachusetts who were born in 2003? Using the SELECT command SELECT chooses the fields that you want displayed in your chart. This is the specific piece of information that you wan...
Whenever you will be asked to write the test cases for the‘Form with some controls’,you need to follow the list of rules for writing test cases as mentioned below: Write a test case on each form object. Written test cases should be a combination of bothnegative and positive test cases...
Having the overall picture will spare you a lot of time in the long-run, so invest some time when you’re starting. Let’s Start with the Complex Query In case I spent too many words so far, let’s remind ourselves of the original question –“How to write a complex SELECT query?