How do I check if two strings are equal in SQL?

How do I check if two strings are equal in SQL?

In SQL, we can compare two strings using STRCMP () function. STRCMP () returns ‘0’ when the two strings are the same, returns ‘-1’ if the first string is smaller than the second string, and returns 1 if the first string is larger than the second string. The following SQL query returns ‘0’ since both strings are same.

What is the output of the string function strcmp (‘ cat dog ‘) in MySQL?

Output -1: MySQL STRCMP() function returns -1 if the first string is smaller than the second string. Output NULL: MySQL STRCMP() function returns NULL if any one or both of the argument of STRCMP() function is NULL.

How do I compare two string lengths in SQL?

MySQL strcmp() function is used to compare two strings. It returns 0 if both of the strings are same and returns -1 when the first argument is smaller than the second according to the defined order and 1 when the second one is smaller the first one. First string for comparison. Second string for comparison.

How do I check if two strings are not equal in SQL?

SQL Not Equal (<>) Operator In SQL, not equal operator is used to check whether two expressions equal or not. If it’s not equal then condition will be true and it will return not matched records. Both != and <> operators are not equal operators and will return same result but !=

What does <> operator mean in SQL?

We use SQL Not Equal comparison operator (<>) to compare two expressions. For example, 10<>11 comparison operation uses SQL Not Equal operator (<>) between two expressions 10 and 11.

Can Unique Key have null values?

The primary key column cannot have null values while the Unique Key column can have one null value.

How does string compare to case sensitive in MySQL?

The most correct way to perform a case sensitive string comparison without changing the collation of the column being queried is to explicitly specify a character set and collation for the value that the column is being compared to.

How many types of functions are there in MySQL?

MySQL Functions: String, Numeric, User-Defined, Stored.

How can you compare numeric values in an SQL query?

The greater than equal to operator is used to test whether an expression (or number) is either greater than or equal to another one.

How do I write if else in MySQL?

The syntax for the IF-THEN-ELSE statement in MySQL is: IF condition1 THEN {… statements to execute when condition1 is TRUE…} [ ELSEIF condition2 THEN {…

How do I compare two columns in the same table in SQL?

Here’s the generic SQL query to two compare columns (column1, column2) in a table (table1). mysql> select * from table1 where column1 not in (select column2 from table1); In the above query, update table1, column1 and column2 as per your requirement.

How to check similarity between two strings in MySQL?

Similarity between two strings can be checked with the help of ‘strcmp ()’ function. Here are the conditions. If both strings are equal, then it returns 0. If first string is less than the second string, it returns -1. If first string is greater than the second string, it returns 1. Here is an example.

What is select in MySQL?

MySQL – Select Query. The SQL SELECT command is used to fetch data from the MySQL database. You can use this command at mysql> prompt as well as in any script like PHP.

What is query in MySQL?

Query Cache in MySQL is used in scenarios when the same queries need to be executed on the same data set. These queries also return the same result. Query cache is most useful when there are tables that are not expected to change very often. It is important to note that the query cache does not return old data.