CASE can be used in any statement or clause that allows a valid expression. For example, you can use CASE in statements such as SELECT, UPDATE, DELETE and SET, and in clauses such as select_list, IN, WHERE, ORDER BY, and HAVING. Suppose we want to get all people from the Persons table whose persontype is either VC or IN.
How to use a case statement in a where clause?
I believe you can use a case statement in a where clause, here is how I do it: Select ProductID OrderNo, OrderType, OrderLineNo From Order_Detail Where ProductID in ( Select Case when (@Varibale1 != '') then (Select ProductID from Product P Where .......) Else (Select ProductID from Product) End as ProductID )
How do you use a case statement in a SELECT statement?
According to Ms SQL Docs a CASE statement can be used throughout the SELECT statement. CASE can be used in any statement or clause that allows a valid expression. For example, you can use CASE in statements such as SELECT, UPDATE, DELETE and SET, and in clauses such as select_list, IN, WHERE, ORDER BY, and HAVING.
Can you use case in a where?
You can use case in a where, but not like that. Case has to return one value per statement. @SeanCoetzee. I don't understand. Can you give me an example? just asking, what's the point of THEN (2,5,9,6)? No you can't use case and in like this. But you can do
What is an example of a case statement?
For example, you can use CASE in statements such as SELECT, UPDATE, DELETE and SET, and in clauses such as select_list, IN, WHERE, ORDER BY, and HAVING. Suppose we want to get all people from the Persons table whose persontype is either VC or IN.
How to use case statement in where clause?
What is the meaning of "back up"?
Is SQL Server a simple or a search?
Can branches of case expressions return values?
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Can we use case in WHERE clause in Oracle?
You can use a CASE expression in any statement or clause that accepts a valid expression. For example, you can use the CASE expression in statements such as SELECT , UPDATE , or DELETE , and in clauses like SELECT , WHERE , HAVING , and ORDDER BY .
Can you use WHERE and Case in SQL?
We can use a case statement in Where, Order by and Group by clause. In the Customer table, I have displayed the First Name is Ram or the Last Name is Sharma's salary. So, by using a CASE statement with the where condition displays the result.
Which conditions can we use with WHERE clause?
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.
Which operator can be used with WHERE clause?
The SQL WHERE clause is used to restrict the number of rows affected by a SELECT, UPDATE or DELETE query. The WHERE condition in SQL can be used in conjunction with logical operators such as AND and OR, comparison operators such as ,= etc.
Can we write CASE statement in WHERE clause in SQL Server?
The case statement in SQL returns a value on a specified condition. We can use a Case statement in select queries along with Where, Order By, and Group By clause.
Can we use WHERE clause with drop?
WHERE clause mainly used along with the DELETE command. No clause required along with DROP command. Actions performed by DELETE can be rolled back as it uses buffer. Actions performed by DROP can't be rolled back because it directly works on actual data.
WHERE clauses Cannot be used with?
The difference between the having and where clause in SQL is that the where clause cannot be used with aggregates, but the having clause can. The where clause works on row's data, not on aggregated data.
Can WHERE clause have 2 conditions?
You can specify multiple conditions in a single WHERE clause to, say, retrieve rows based on the values in multiple columns. You can use the AND and OR operators to combine two or more conditions into a compound condition.
In which of the following statement WHERE clause is not allowed?
Answer: C. A column alias cannot be used in WHERE clause conditions but can be used in SELECT statement and ORDER BY clause.
Can we use Array in WHERE clause?
We can pass an array with the help of where IN clause. Let us first create a new table for our example. Let us now insert records. To display all records.
Can I use two AND in WHERE clause in SQL?
Example - Two Conditions in the WHERE Clause (AND Condition) You can use the AND condition in the WHERE clause to specify more than 1 condition that must be met for the record to be selected.
How do you give multiple conditions in a case in SQL?
Here are 3 different ways to apply a case statement using SQL:(1) For a single condition: CASE WHEN condition_1 THEN result_1 ELSE result_2 END AS new_field_name.(2) For multiple conditions using AND: CASE WHEN condition_1 AND condition_2 THEN result_1 ELSE result_2 END AS new_field_name.More items...•
Can you use WHERE AND WHERE not in SQL?
WHERE conditions can be combined with AND, OR, and NOT.
Can we use WHERE AND group by together in SQL?
GROUP BY clause is used with the SELECT statement. In the query, GROUP BY clause is placed after the WHERE clause. In the query, GROUP BY clause is placed before ORDER BY clause if used any.
CASE in WHERE, SQL Server - Stack Overflow
I'm doing some search, where users are choosing in dropdown some clauses. When they leave some box empty, I want query to ignore clause. I know CASE, and best I thought of is that if I pass 0 to parameter in stored procedure, it ignores that parameter, like this.
SQL use CASE statement in WHERE IN clause - Stack Overflow
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SQL CASE Statement in WHERE Clause - Kodyaz
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How to use case statement in where clause?
If you are still wanting to know how to utilize a CASE Statement Expression in a WHERE Clause the CASE Expression must be compared to a value as that is the syntax understood for conditions contained within a WHERE Clause. See below a mock example.
What is the meaning of "back up"?
Making statements based on opinion; back them up with references or personal experience.
Is SQL Server a simple or a search?
As an example of this... SQL Server refers to these as Simple vs Searched but refers to all of it as a CASE Expression. Therefore a CASE Expression can either be a Simple or a Searched CASE that can be used within a Statement.
Can branches of case expressions return values?
The branches of a case expression can only return values, not additional expressions to be evaluated in the where condition. You could, however, simulate this behavior with the and and or logical operators:
Where Can I use a CASE Statement?
According to Ms SQL Docs a CASE statement can be used throughout the SELECT statement.
Example CASE Query
Suppose we want to get all people from the Persons table whose persontype is either VC or IN. To do this with CASE you could write:
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About the Author
Hello my name is Kris. I’m here because I am passionate about helping non-techie people to overcome their fear of learning SQL.
What is a case expression in SQL?
The CASE expression in SQL can be seen as a "function" that returns a value (of certain data type) based on IF... THEN... ELSE logic.
Does tab2col2 have a varchar?
No! the tab2.col2 will either have some VARCHAR value OR contain s NULL.
Is a case expression documented in Oracle?
CASE expression is also documented well in Oracle documentation availabe here... CASE Expressions
How to use case statement in where clause?
If you are still wanting to know how to utilize a CASE Statement Expression in a WHERE Clause the CASE Expression must be compared to a value as that is the syntax understood for conditions contained within a WHERE Clause. See below a mock example.
What is the meaning of "back up"?
Making statements based on opinion; back them up with references or personal experience.
Is SQL Server a simple or a search?
As an example of this... SQL Server refers to these as Simple vs Searched but refers to all of it as a CASE Expression. Therefore a CASE Expression can either be a Simple or a Searched CASE that can be used within a Statement.
Can branches of case expressions return values?
The branches of a case expression can only return values, not additional expressions to be evaluated in the where condition. You could, however, simulate this behavior with the and and or logical operators:
