Oracle sql conditional where clause based on parameter. Conditional where clause using non-NULL parameters.
Oracle sql conditional where clause based on parameter. ex: select * from table WHERE 1 = CASE WHEN Hi Team, I need to write a query in such a way that I should fetch the data from a table there is a optional parameter (Emp_name) which comes from front end and I need to I'm interesting that how can I use if-then-else statement or any control structure in where clause in Oracle. This is a series of when clauses that the database runs in order: For example, if When restricting data based on a parameter I usually use the following: AND p. Improve this question. Create Procedure( aSRCHLOGI Building where clause based on null/not null parameters in sql. For 4 possible columns on search criteria it is still possible to have 2^4-1 possible SQL texts to use. You could have a parameter for each possible flag column, then check if the parameter is null or the value in the column is equal to the parameter. I have a stored procedure that, for a few parameters, takes in an enumeration array (which has been accordingly translated to a user-defined table type @Rene The order of conditions does not matter at all. Should this work? CREATE OR REPLACE package body If_Else_Pack IS Summary: in this tutorial, you will learn how to use the Oracle WHERE clause to specify a condition for filtering rows returned by a query. [DateRange] ( @StartDate date, @EndDate date, @Location varchar(25), @Device varchar(25) ) RETURNS TABLE AS RETURN ( SELECT * FROM MyTable WHERE Date < @EndDate AND Date > I am new to this group. start_date = NVL (p_start_date, p. The SQL query is: IF(@CustomerType = Blank) BEGIN Select * From Customer Where (CustomerType Hello guys, I would like to know whether it is possible to use a CASE condition in my WHERE clause using a parameter. start_date ELSE A use case has come up to pass blank values into the function for any of the IN parameters and have it select ANY value in the where clause where the parameter is blank. Improve this answer SQL add conditional in WHERE clause. The number of variables Making statements based on opinion; back them up with references or personal experience. ColumnName != null which always evaluates to NULL. Check below logic, you can use N number of dynamic / un-sure parameters / conditions-- flages declare @chk_vendor bit; Never forget that in Oracle SQL the '' literal (empty string) is the same as NULL, hence your predicate e. If you want to do if-else-then logic in select, where or anywhere else in a statement, you need a case expression. Id = 123) OR (@Checkbool = 0 AND A. tablename is a static property which does not change. You just need to use boolean logic (or rather the ternary logic that SQL uses) and rewrite it: WHERE DateDropped = 0 AND ( @JobsOnHold = 1 AND DateAppr As the query gets complex there will be more input parameters like this and the amount of IF ELSE required would be too much. New requirement involves greater than or equal to, so I tried this: AND CASE WHEN (p_start_date = NULL) THEN p. sql> select * from emp t 2 order by 3 case 4 when comm is null 5 then sal 6 else empno 7 end 8 / empno ename job mgr . create or replace procedure test_pl(rf in varchar2) IS counter number; BEGIN select count(*) into counter from test_pl_imp where column_name in (rf); Case construct with WHERE clause Hi Tom, I have a question and I don't know if this is possible or if i'm jsut doing something wrong because i get multiple errors like missing right paren, or missing keyword. If user selects any parameter(s) then only the 'WHERE' be active else it will be inactive. I want to use the CASE construct after a WHERE clause to build an expression. here is my situation: I have a bit value that determines what rows to return in a select statement. ColumnName != '' is equivalent to e. 0. As you noticed this can be a very long where-clause. Follow edited Jan 24, 2013 at 16:07. col1. How to do a conditional where clause with where in PL/SQL within Procedure. Sign up or log in. from table/view where first To filter data by multiple conditions in a WHERE clause, use the AND operator to connect the conditions. buf 1 with t1 as 2 ( 3 select 1 as seq, 'nothing 1' as some_type from dual union all 4 select 2 as seq, 'nothing 2' as some_type from dual union all 5 select 3 as seq, 'something 1' as some_type from dual union all 6 select 4 as seq, 'something 2' as some_type from dual union all 7 select 5 as seq, 'something 3' as some_type from dual union all 8 select 6 Case construct with WHERE clause Hi Tom, I have a question and I don't know if this is possible or if i'm jsut doing something wrong because i get multiple errors like missing right paren, or missing keyword. I was trying to think of having a cursor with condition select statement. If the value is true, I need to return rows where the import_id column is not null, if false, then I want the rows where the import_id column is null. This SELECT statement would return all supplier_name and Using dynamic SQL is the simplest approach from a coding standpoint. WHERE If this were to be done using sql queries I would have used string builder to have them appended to the main strSQL query. start_date) so IF the parameter is null THEN I just join on itself, ELSE we filter on parameter. from table/view where first condition always and optional second condition based on the value based on the apex variable :P222_VARIABLE_NAME I am getting the value of the parameter at the runtime using a need to put a condition in my sql where clause such that if the value is null, then it should be ignored from the condition. Making statements based on opinion; back them up with references or personal experience. Creating dynamic SQL need little trick and multiple steps. CREATE FUNCTION [dbo]. On rows where ParkID IS NOT NULL, we only want to keep those rows if ParkID matches the parameter. last_name, t. – Conditional Where Clause Oracle SQL based on procedure input varaible. Create Procedure( aSRCHLOGI Now, I am trying to set up another AND clause for ParkID. The problem with dynamic SQL, though, is that you have to hard parse every distinct version of the query which not only has the potential of taxing your CPU but has the potential to flood your shared pool with lots of non-sharable SQL statements, pushing out statements you'd like to This question may boil down to something simpler, but I am still curious as to how close SQL Server / TSQL can get to conditional WHERE clauses (and reasoning behind why they don't exist would also be interesting). Add IF / CASE statement inside where condition. That expression should be morphotropic(;)) So, assuming stardard oracle's employee schema, managers are: select * from emp e where exists (select emp_id from emp where e. 1. 4k This is particularly useful when your conditions are not based on And I want to add the WHERE condition subResult = :parameter. It has to be optimized before Oracle even sees bind variables. We can use a CASE statement in WHERE clause as: SELECT employee_no, name, department_no FROM emps WHERE (CASE WHEN :p_dept_no = 50 THEN 0 WHEN :p_dept_no = 70 THEN 0 ELSE -1 END) = 0; There’s no if keyword in SQL. For example, we can use it to create IF-THEN-ELSE style queries that can be used to I'm attempting to use the IFELSE construct in my WHERE clause to selectively apply conditions to my SELECT. I have a parameter based on which I need to include or exclude one condition in a where clause. Ask Question Asked 11 years, 4 months ago. To learn more, see our tips on writing great answers. oracle-database; plsql; Share. from table/view where first condition always and optional second condition based on the value based on the apex variable :P222_VARIABLE_NAME I am getting the value of the parameter at the runtime using a Say I have a sample table: id_pk value ----- 1 a 2 b 3 c And I have a sample PL/SQL block, which has a query that currently selects a single row into an array: There is a problem executing this block of code while passing the parameter. Alternatively to the ISNULL / COALESCE options, you can test the parameters for being null: SELECT NAME FROM TABLE WHERE (@City IS NULL OR City = @City) AND (@Gender IS NULL OR Gender = @Gender) AND (@Age IS NULL OR Age = @Age) Share. id=emp. An example is if IN_1_id is passed a blank value, the where clause in the first select statement would show where ANY value (even null) is in the opt. start_date) so IF the parameter is null THEN I just join on Oracle CASE expression allows you to add if-else logic to SQL statements without having to call a procedure. But, I only want to execute this AND on rows where ParkID IS NOT NULL. Now, order by clause use an expression and order rows upon it. Then you pass in a 1 for the flags that you want to check and leave the others null. select * from TABLE I find the case statement easier to interpret in the where clause with parenthesis, though it can be written either way. The problem with dynamic SQL, though, is that you have to hard parse every distinct version of the CASE might help you out: SELECT t. And the :parameter is optional, meaning if :parameter is null, include row in result. Sign Oracle-SQL: Dont consider AND If Using dynamic SQL is the simplest approach from a coding standpoint. Main idea is to generate a sql based on inputs dynamically. Add condition in SQL Query. No, Oracle can't use boolean expressions as results from functions. status = (CASE WHEN status_flag = STATUS_ACTIVE Making statements based on opinion; back them up with references or personal experience. I'm guessing this is possible, but it seems that I'm approaching it in the wrong I am modifying an existing stored procedure in SQL server and trying to come up with a query that should take a conditional WHERE depending on whether one of the input When restricting data based on a parameter I usually use the following: AND p. field1, field2, (!) and the contents can change. column2 = "something" AND (:parameter is null or subResult = :parameter) But I can't reference the result of the subquery subResult inside my WHERE condition. You can use a My goal is to return fieldX or fieldY depending on the where clause (which I don't have any control on since it's generated by a third party software). The CASE expression evaluates a list of conditions and returns one of the multiple possible results. Viewed 9k times Conditional where clause using non-NULL parameters. But here in Linq I can only think of using an IF condition where I will Is it possible to use an IF clause within a WHERE clause in MS SQL? Example: WHERE IF IsNumeric(@OrderNumber) = 1 OrderNumber = @OrderNumber ELSE you can have case construct in the order by clause :. need to put a condition in my sql where clause such that if the value is null, then it should be ignored from the condition. The faster way would be what hamishmcn Now, I am trying to set up another AND clause for ParkID. Sign up This Oracle WHERE clause example uses the WHERE clause to join multiple tables together in a single SELECT statement. Select query only when a value is not null in sql. Viewed 2k times 0 I have a plsql procedure which take an input variable. I dont really know what to search for, so I ask here for links or even a word to search for. Sign up conditional-operator; Share. Oracle PL/SQL: If you have a CHECK constraint on the "EngExec Status" column to restrict the value to either 'True' or 'False' then you can simplify the WHERE filter to:. Parameter rf is a list of variables to be input into the WHERE clause. The number of variables to be input is not static. Add Say I have a sample table: id_pk value ----- 1 a 2 b 3 c And I have a sample PL/SQL block, which has a query that currently selects a single row into an array: No need to use ad-hoc query (execute SP_ExecuteSQL). So I need an option to build up a SQL statement in PL/SQL within a recursive function. Conditional SQL where clause. sql> ed wrote file afiedt. For example, I have a query which takes the ID of the organisation as parameter: The problem with your query is that in CASE expressions, the THEN and ELSE parts have to have an expression that evaluates to a number or a varchar or any other datatype but not to a boolean value. 13. I want to use as: when pcustomer_id IS NULL then WHERE How can I select records from a table , say emp, when I have a parameter for where condition like if empno is known then use in where clause, if ename is known then use Here is another using just the WHERE Clause: SELECT * FROM Table A WHERE (@Checkbool = 1 AND A. Here’s what this looks like for two conditions: In our example, condition1 is dept = WHERE ( subsidiary_id = :sub_id OR :sub_id IS NULL ) AND ( employee_id = :emp_id OR :emp_id IS NULL ) AND ( UPPER(last_name) = :name OR :name IS NULL ) The query uses I would like to change the WHERE clause of a query based upon the value of an input parameter. Ask Question Asked 9 years, 1 month ago. Modified 9 years, 1 month ago. Based on the script in question, it seems that you need the condition for Column1 irrespective of whether the variable @booleanResult is set to true or false. This performs efficiently when you have complex SQL with large tables and you want to avoid IN('All') kind of default clauses. first_name, t. Add/Skip WHERE CLAUSE based on Condition. Luke Girvin. start_date = p. So, I have added that condition to the WHERE clause and in the remaining condition checks whether the variable is set to 1 (true) or if it is set to 0 (false) then it will also check for the condition on Column2. employid, t. where (case when slogic = 'begins' and partnum like sPartStrp||'%' then 1 when slogic = 'contains' and I've a procedure that takes two parameters, I want to include/exclude a parameter in Where clause based on parameter's length: For example, Procedure: Is there any advantage using non-equi join instead of where clause in Oracle SQL? We can use the CASE statement to perform conditional logic within a WHERE clause. Modified 11 years, 4 months ago. Id <> 123) Everything you put Making statements based on opinion; back them up with references or personal experience. The WHERE clause specifies a search Hi, need to put a condition in my sql where clause such that if the value is null, then it should be ignored from the condition. So, if on rows where ParkID IS NULL, Based on my condition,(for eg. If the CustomerType parameter is blank, then I need to include a condition CustomerType is null, otherwise I need to exclude that CustomerType is null condition. SQL - Retrieve records based on parameters where either parameter can be null. This is just one more And I want to add the WHERE condition subResult = :parameter. So, if on rows where ParkID IS NULL, we want to always keep those rows. The problem for Oracle is that the SQL's exec plan has to be optimized for ANY combination of bind parameter values. Second problem is that you are trying output a boolean value from your CASE. . Problematic sample query is as follows: select case when char_length('19480821') = 8 then I'm trying to avoid dynamic sql. The most efficient way according to my own testing is: *Remark: only valid for NON-NULLABLE columns, as commented by Aaron. Some how like this pseudo code--[B]cursor test_cursor is if condition == 't11' then select * from test1; else select * from test1; end if;[/B] begin for cursorVal in test_cursor loop //Doing the actual task on cursor data. for example. WHERE table1. I need to check a value from a parameter, and depending on it, apply the right clause. mgr_id) An workaround query may be: Never forget that in Oracle SQL the '' literal (empty string) is the same as NULL, hence your predicate e. This is a A use case has come up to pass blank values into the function for any of the IN parameters and have it select ANY value in the where clause where the parameter is blank. status FROM employeetable t WHERE t. Condition WHERE clauses I need help writing a conditional where clause. . WHERE Instead of evaluating your procedure's parameter state in the SQL statement itself, move that evaulation to the containing PL/SQL block so it's executed only once before the There is a problem executing this block of code while passing the parameter. For understandability, I'll simplify the problem and basically my update statement should look like since you'll be full scanning - and you'll of course be using bind variables, you can simply code: select * from country where name like plsql_variable_name and (continent like The best way to do this would be to use Oracle's Application Context feature, best defined as best performance and security. ColumnName != null which always I have a problem with building a conditional update statement in Oracle. length), I want to execute different SQL statement. If @ParkID = 22, then return both rows. Ex: select . oracle procedure with case It depends from parameter. Sign up Making statements based on opinion; back them up with references or personal experience.