Types of SQL Comments Depending on your needs and preferences, there are three ways to add comments in SQL scripts. Single-line comments If your comment fits well within a single line, use double hyphens. Typically, you would place such comments above the relevant block of code to provide co...
In this method, we first write out the query then we add a separator i.e. “\\”, and then we will write the comment using - -. The query and the comment are separated by the separator. The comment in this case is not printed as an output of executing the query. Let’s implemen...
How to write a comment in MySQL The comment function will let you write any text to add a comment in MySQL. It does not affect the final output as long as it comes before or after a definite pre-programmed character. To add comments in MySQL, you can use the following symbols:/* */...
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Write SQL query to update doctor charges and room charges in bill table increase by 100 UPDATE bill SET doctor_charge = bill.doctor_charge + 100, room_charge = bill.room_charge + 100 FROM bill LEFT OUTER JOIN doctor ON bill.doctor_id = doctor.doctor_id; ...
Use either method below to gather the SQL Profiler Trace: METHOD 1 - Use a SQL Template The templates are pre-mapped for the fields noted in Method 2, so will save you some time from having to manually map the fields. To use a SQL Trace template,...
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To calculate the percentage in an Sql statement, we can use the basic percentage arithmetic formula along with some basic SQL Server functions
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, it could be frustrating whe...