What is sign in SQL?
The @CustID means it’s a parameter that you will supply a value for later in your code. This is the best way of protecting against SQL injection. Create your query using parameters, rather than concatenating strings and variables.
What is <> sign in SQL?
Not Equal To (Transact SQL) – traditional
Compares two expressions (a comparison operator). When you compare nonnull expressions, the result is TRUE if the left operand is not equal to the right operand; otherwise, the result is FALSE.
What is the use of Soundex () in SQL?
SOUNDEX converts an alphanumeric string to a four-character code that is based on how the string sounds when spoken in English. The first character of the code is the first character of character_expression, converted to upper case.
Can I use sign in SQL?
SIGN() Function in SQL Server. SIGN() function : This function in SQL Server is used to return the sign of the specified number. It returns 1 if the number is positive, -1 if the number is negative and 0 for zero number.
What is SQL example?
SQL is an ANSI and ISO standard, and is the de facto standard database query language. A variety of established database products support SQL, including products from Oracle and Microsoft SQL Server. It is widely used in both industry and academia, often for enormous, complex databases.
How do I use decode?
The DECODE function returns a value that is the same datatype as the first result in the list. If the first result is NULL, then the return value is converted to VARCHAR2. If the first result has a datatype of CHAR, then the return value is converted to VARCHAR2. If no matches are found, the default value is returned.
What is the use of in SQL?
The SQL IN condition (sometimes called the IN operator) allows you to easily test if an expression matches any value in a list of values. It is used to help reduce the need for multiple OR conditions in a SELECT, INSERT, UPDATE, or DELETE statement.
How do I decrease in SQL?
LOWER() function in SQL Server
This function in SQL Server helps to convert all the letters of the given string to lowercase. If the given string contains characters other than alphabets, then they will remain unchanged by this function. Parameters : str – The string which will be converted to lowercase.
What is replace in SQL?
The REPLACE() function replaces all occurrences of a substring within a string, with a new substring. Note: The search is case-insensitive.
What does concat do in SQL?
CONCAT function is a SQL string function that provides to concatenate two or more than two character expressions into a single string.
What is SOUNDEX used for?
Soundex is a phonetic algorithm for indexing names by sound, as pronounced in English. The goal is for homophones to be encoded to the same representation so that they can be matched despite minor differences in spelling.
How do you use SOUNDEX?
SOUNDEX() function in MySQL is used to return a phonetic representation of a string. The phonetic represents the way the string will sound. The SOUNDEX function helps to compare words that are spelled differently, but sound alike in English.
What is SOUNDEX value?
Description. The SOUNDEX function evaluates expression and returns the most significant letter in the input string followed by a phonetic code. Characters that are not alphabetic are ignored. If expression evaluates to the null value, null is returned.