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What can be the condition in where clause in a SQL query?
The SQL WHERE clause is used to specify a condition while fetching the data from a single table or by joining with multiple tables. If the given condition is satisfied, then only it returns a specific value from the table. You should use the WHERE clause to filter the records and fetching only the necessary records.
What are the two types of IF statement?
There are three forms of IF statements: IF-THEN , IF-THEN-ELSE , and IF-THEN-ELSIF . The simplest form of IF statement associates a Boolean expression with a sequence of statements enclosed by the keywords THEN and END IF . The sequence of statements is executed only if the expression returns TRUE .
Can I use a ‘case’ statement in a ‘where’ clause?
Using a Case Statement in a SQL Where Clause. It is common knowledge that you can apply a Case statement in the SELECT or ORDER BY portion of a SQL statement. What isn’t well known is that you can use it effectively in a WHERE clause. Take an example I just ran into: I want to show all orders to every employee unless the order is assigned…
What is the clause in this statement?
A clause is a statement or a question that generally consists of a subject and a verb phrase and constitutes a complete thought. Sentences can consist of a single clause, but they often include two: a main, or independent, clause and a subordinate, or dependent, clause. A main clause can form a complete sentence.
Where clause SQL multiple values?
The SQL IN Operator. The IN operator allows you to specify multiple values in a WHERE clause. The IN operator is a shorthand for multiple OR conditions. SELECT column_name(s) FROM table_name. WHERE column_name IN (value1, value2.);
What is if statement in SQL?
SQL Else If. The SQL Else If statement is very useful to check multiple conditions at once. It is an extension to the If then Else (which we discussed in the earlier post). If Else statement will only execute the statements when the given condition is either true or False but in real world, we may have to check more than two conditions.