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The STRCMP() function compares two strings. Can we compare strings in SQL? The STRCMP() function compares two strings. How do I match two strings 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, …
It can be used to compare two values. If you use double equal sign(==) in MySQL, you will get an error message. Now, compare the above variable value with 10. If both the values are same then the result will be 1 otherwise 0. What does == do in SQL? It can be used to compare two values. If you …
The main difference between the == and === operator in javascript is that the == operator does the type conversion of the operands before comparison, whereas the === operator compares the values as well as the data types of the operands. What is difference between === and ==? The main difference between the == and === operator in javascript is …
Pattern matching is used by the shell commands such as the ls command, whereas regular expressions are used to search for strings of text in a file by using commands, such as the grep command. Which command is used to match strings? Pattern matching is used by the shell commands such as the ls command, whereas regular expressions are used …
If you need to check a single database, you can quickly find the SQL Server database sizein SQL Server Management Studio (SSMS): Right-click the database and then click Reports -> Standard Reports -> Disk Usage. Alternatively, you can use stored procedures like exec sp_spaceused to get database size. How do I find the size of a database? You can find …
In MySQL, you can use the or != operators to test for inequality in a query. For example, we could test for inequality using the operator, as follows: SELECT * FROM contacts WHERE last_name ‘Johnson’; What does != Mean in a query? means not equal to, != also means not equal to. How do you use not equal to in …
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. How many SQL syntax are …
The ISNULL() function returns 1 or 0 depending on whether an expression is NULL. If expression is NULL, this function returns 1. Otherwise, it returns 0. IS NULL function in MySQL? The ISNULL() function returns 1 or 0 depending on whether an expression is NULL. If expression is NULL, this function returns 1. Otherwise, it returns 0. Is NULL and …
The IS NULL condition is satisfied if the column contains a null value or if the expression cannot be evaluated because it contains one or more null values. If you use the IS NOT NULL operator, the condition is satisfied when the operand is column value that is not null, or an expression that does not evaluate to null. What …
That is why you should not use SELECT * in an SQL query anymore. It’s always better to use the explicit column list in a SELECT query than a * wild card. It not only improves performance but also makes your code more explicit. Why should we not use * in SQL? SELECT * return more data than required to …