Subtracts the value of the right operand from the value of the left operand and assigns the result to the left operand. C -= A is same as C = C – A. *= Multiply then assign. Multiplies the value of the right operand with the value of the left operand and assigns the result to the left operand. What …
The wildcard selector literally means any descendant of the preceding selector. So given a selector like div#nav * would match any elements that are nested with a element, but not the element itself. Let me show you a useful example. What is the purpose of * In selector? Answer: A selector is one of the properties of the object that …
COUNT(*) returns the number of rows in a specified table, and it preserves duplicate rows. It counts each row separately. This includes rows that contain null values. What is the use of count (*)? What is the use of * in SQL? The second part of a SQL query is the name of the column you want to retrieve for …
An asterisk is a star-shaped symbol (*) that has a few uses in writing. It is most commonly used to signal a footnote, but it is sometimes also used to clarify a statement or to censor inappropriate language. What does an asterisk (*) mean in your code? (2) In programming, the asterisk or “star” symbol (*) means multiplication. For example, …
An asterisk (” * “) can be used to specify that the query should return all columns of the queried tables. SELECT is the most complex statement in SQL, with optional keywords and clauses that include: The FROM clause, which indicates the table(s) to retrieve data from. What does * represent in SQL? A wildcard character is used to substitute …
LIKE is an operator similar to LIKE in SQL. We use LIKE to search for string with similar text. RLIKE (Right-Like) is a special function in Hive where if any substring of A matches with B then it evaluates to true. It also obeys Java regular expression pattern. What is Rlike in SQL? The RLIKE operator in MySQL is used …
The SQL Like is used when we want to return the row if specific character string matches a specified pattern. The pattern can be a combination of regular characters and wildcard characters. To return a row back, regular characters must exactly match the characters specified in the character string. When should I use like in SQL? The SQL Like is …
Wildcards are symbols used in database searchs to represent a letter or letters in a word. Wildcards can be useful when searching for information because they enable different forms or spelling of a word to be searched similtaneously. What are wildcards how are they useful? Wildcards are special characters that can stand in for unknown characters in a text value …
