Retrieve a deleted message or conversation In Messages, tap Edit. Tap Show Recently Deleted . Choose the conversations with the messages you want to restore, then tap Recover.
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How long should a SQL query take?
Why is MySQL query taking so long? Queries can become slow for various reasons ranging from improper index usage to bugs in the storage engine itself. However, in most cases, queries become slow because developers or MySQL database administrators neglect to monitor them and keep an eye on their performance. How long is too long…
Is SELECT * faster than SELECT column?
Selecting distinct and less than all columns will always be faster than selecting *. Is SELECT * slower than SELECT column? For your question just use SELECT *. If you need all the columns there’s no performance difference. What is the difference between SELECT * and SELECT column name? SELECT * will return 100 columns…
Which of the following symbols are used for comments in Python A B C * * d?
Comments in Python are identified with a hash symbol, #, and extend to the end of the line. Which of the following symbols are used for comments in Python A B C D * *? Practical Data Science using Python In Python script, the symbol # indicates start of comment line. A triple quoted multi-line…
What is /* in Java?
/** is known as documentation comments. It is used by Javadoc tool while creating the documentation for the program code. /* is used for multi-line comments. What is the use of /* */? /* */ (multiline comment) Multiline comments are used for large text descriptions of code or to comment out chunks of code while…
What is a method in SQL?
A method is procedure or function that is part of the object type definition, and that can operate on the attributes of the type. Such methods are also called member methods, and they take the keyword MEMBER when you specify them as a component of the object type. What is method in database? A database…
What are random or accidental error?
Random Errors Accidental errors are brought about by changing experimental conditions that are beyond the control of the experimenter; examples are vibrations in the equipment, changes in the humidity, fluctuating temperature, etc. What are examples of random errors? An example of random error is putting the same weight on an electronic scales several times and…
How do I remove a program error?
In search on the taskbar, enter Control Panel and select it from the results. Select Programs > Programs and Features. Press and hold (or right-click) on the program you want to remove and select Uninstall or Uninstall/Change. Then follow the directions on the screen. How do I uninstall a program error? In search on the…
What is syntax error in short?
In computer science, a syntax error is an error in the syntax of a sequence of characters or tokens that is intended to be written in a particular programming language. For compiled languages, syntax errors are detected at compile-time. A program will not compile until all syntax errors are corrected. What Is syntax error Short…
Do all SQL have same syntax?
The basic SQL structure is the same — all databases support SELECT , FROM , GROUP BY , and similar constructs. However, there are definitely differences among databases. Much of what you have learned will apply to other databases, but it is worth testing to be sure that it works and does what you intend.…