Oracle sql conditional where clause based on parameter. How to Make the Predicate in WHERE Clause Optional Based on a Parameter. And I want to add the WHERE condition subResult = :parameter. ; SQL Conditional Join if Exists- Join tables on the condition that certain data exists. DECLARE @Parameter int = null; SELECT * FROM TABLE WHERE [AlternateID] is not null AND (@Parameter is not null AND [AlternateID] = @Parameter) The most efficient way according to my own testing is: *Remark: only valid for NON-NULLABLE columns, as commented by Aaron. I How can I add a condition inside the WHERE CLAUSE based on a case or if condition? SELECT C. In working with an SSRS report, I'm passing in a string of states to a view. I tried to do this as below but always had no rows returned if @Parameter was null. Skip to main content. These methods include using CASE, Boolean Operators, IF () or You don't necessarily need dynamic SQL just because certain where conditions don't apply when they are not present. GroupName,A. 4. I have a problem with building a conditional update statement in Oracle. This is why when there are lots of parameters (several search fields in a big form for example), I like to use dynamic SQL: I am creating oracle report where if the user inputs true or false, the respective values should go to parameter. So, putting a CASE expression into the WHERE clause as you I am creating oracle report where if the user inputs true or false, the respective values should go to parameter. SQL how to include conditional in where clause. I have a SQL Server 2005 stored proc that takes a parameter: @includeClosedProjects. This performs efficiently when you have complex SQL with large tables and you want to avoid IN('All') kind of default As you noticed this can be a very long where-clause. SELECT * FROM T_Mytable m WHERE m. start_date = NVL (p_start_date, p. EMPLOYEE ID DEPT LOCATION UNIT: User might enter any of the field values all are optional, if he enter EMPLOYEE ID then the query should return rows related to that EMPLOYEE ID. For example, I have a query which takes the ID of the organisation I am getting the value of the parameter at the runtime using a variable. Oracle and SQL server are not open source, but, as far as I know, they are based equivalence rules (similar to those in relational algebra), and they also produce identical execution plans in both cases. TABLE function and where clause parameters retrieving Hi there,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). If none are true (the percentage is less than 50 or null), it returns the value in the else clause which is F. Change from using the "or" syntax to a union approach, you'll see 2 seeks that should keep your logical read I have a parameter based on which I need to include or exclude one condition in a where clause. Hi Tom, 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, Now, order by clause use an expression and order rows upon it. 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. Sql conditional statement on where clause. 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 This Oracle tutorial explains how to use the Oracle WHERE clause with syntax and examples. WHERE table1. For understandability, I'll simplify the problem and basically my update statement should look like this: UPDATE SAMPLE_TAB1 t SET t. start_date) so IF the parameter is null THEN I just join on itself, ELSE we filter on parameter. Ex: select . Case statement in where. This performs efficiently when you have complex SQL with large tables and you want to avoid IN('All') kind of default. To select specific rows from a table, you use a WHERE clause in the SELECT statement. The twist is that the users could also pick a selection from the state list called "[ No Selection ]" I have an Oracle function that has 3 parameters and uses parameters to set where clause values in multiple select statements that are union'd together. So I need an option to build up a SQL statement in PL/SQL within a recursive function. If he enters only LOCATION then the query should return all the employees of that location. If user selects any parameter(s) then only the 'WHERE' be active else it will be inactive. CallID, A. COMPARE_TYPE = 'A' AND T1. Discussion: To filter data by multiple conditions in a WHERE clause, use the AND operator to connect the conditions. create proc sel_projects (@incClosedRel int = 1) as SELECT projectId, projectName FROM project WHERE CompletionStatusCID NOT IN (34, 35) <-- controlled by @incClosedRel FROM source WHERE 1=1 --Dynamic where clause for various parameters which may or may not be passed in. It returns the value for the first when clause that is true. Making statements based on opinion; back them up with references or personal experience. New requirement involves greater than or equal to, so I tried this: AND CASE WHEN (p_start_date = NULL) THEN p. 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 ename in where clause, if both are known then use both parameters in where clause. Sign up or Oracle SQL where clause against a timestamp column. For example, if a student scored 75% correct on an exam the database runs these operations: But coding dynamic SQL is useless if you carry over the non-sargable predicates in the first example. SO let's say the first load is 'All'. Sign up or Oracle SQL: Syntax for WHERE clause with one date between two others. But it also risks SQL injection, so it should be performed behind parameterized queries (preferably within stored procedures/functions in packages. 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 A simple (param1 IS NULL OR col1 = param1) takes care of this, as has been answered already. appId = @appId AND @siteId IN (0, m. Developer Advocate. COMPARE_TYPE <> 'A' AND T1. here is my situation: I have a bit value that determines what rows to return in a select statement. 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; IF-THEN logic in SELECT and WHERE with CASE expressions in Oracle SQL. The code below is untested so If we do not use bind parameters but write the actual values in the SQL statement, the optimizer selects the proper index for the active filter: SELECT first_name, last_name, subsidiary_id, 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 I have an 'optional' parameter in my stored procedure, if my parameter has certain value then I need to add a conditional where statement in my existing query. 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 I would like to know whether it is possible to use a CASE condition in my WHERE clause using a parameter. 3. mgr_id) An workaround query may be: Because both your cases share the m. data_as_at_dt ) OR (v_account_id is null Is it possible to change the where condition (using case statement) based on certain variable? For example Try writing the where clause this way: WHERE (T2. I dont really know what to search for, so I ask here for links or even a word to search for. field1, field2, (!) and the contents can change. It will sometimes produce a plan with a UNION ALL but if there are more than a couple of nvl, you will get full scan even if perfectly valid indexes are present. Because both your cases share the m. column2 = "something" AND (:parameter is null or subResult = :parameter) But I can't reference the result of the subquery subResult inside my WHERE condition. 2. I need help writing a conditional where clause. Sign up or Using a complete date field in a oracle sql where clause. For example, to find And I want to add the WHERE condition subResult = :parameter. SQL Server WHERE clause based on conditions. I was trying to only evaluate a part of a multipart WHERE clause if the @Parameter was not null. mgr_id) An workaround query may be: When restricting data based on a parameter I usually use the following: AND p. SELECT column1, column2, FROM table_name Making statements based on opinion; back them up with references or personal experience. It should be something like this: SELECT DateAppr, TimeAppr A great way to optimize the query for different values of your parameter is to make a different execution plan for each value of the parameter. But here in Linq I can only think of using an IF condition where I will write the same query thrice, with each IF block having an additional condition. You can build your statement in the client conditionally or you can create a plpgsql (or any other procedural language) function to take care of it. account_ref_id = v_account_id and v_date = bp. 1. I Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Visit the blog Making statements based on opinion; back them up with references or personal experience. 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 How to use case to do if-then logic in SQL. . if user inputs All, then both true and false should go to parameters. Create Procedure( aSRCHLOGI 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 ename in where clause, if both are known then use both parameters in where clause. The syntax for the CASE statement in a SQL database is: I want to build custom Where condition based on stored procedure inputs, you can use N number of dynamic / un-sure parameters / conditions-- flages declare @chk_vendor bit; Creating a dynamic where clause in SQL Server stored procedure. optional WHERE clause searching for different fields based on a Once you put this into production, the first time Oracle loads the query it peaks at the bind variable and formulates a plan based on that. The TABLE() function is very close to what I want to achieve : select * from TABLE(customFunction()) where param1=XXX AND param2 Making statements based on opinion; back them up with references or personal experience. I 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). 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 I'm brand-new to the Oracle world so this could be a softball. siteId); CASE expressions are designed to generate literal values, not logical expressions, as their output. appId = @appId condition, you may refactor your WHERE logic as:. optional WHERE clause searching for different fields based on a 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 ename in where clause, if both are known then use both parameters in where clause. tablename is a static property which does not change. 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 bring all the records with I need help writing a conditional where clause. Introduction to SQL CASE Statement. How to write the where clause condition with optional FROM source WHERE 1=1 --Dynamic where clause for various parameters which may or may not be passed in. CREATE FUNCTION [dbo]. I want to use the CASE construct after a WHERE clause to build an expression. [DateRange] ( @StartDate date, @EndDate date, @Location varchar(25), @Device varchar(25) ) RETURNS TABLE AS RETURN ( SELECT * FROM MyTable WHERE Date < @EndDate AND Date > Let’s now look at some common variations, with their business-based examples farther below: SQL Conditional Join Based on Value- Join tables when a specific column’s value meets certain criteria. 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. There’s no if keyword in You would just use a where clause for this: where ( (v_account_id is not null AND bp. Here’s what this looks like for two conditions: WHERE condition1 AND condition2 In our example, condition1 is dept = 'Finance' and condition2 is salary > 4000. for example. The WHERE clause then continues with further conditions but this specific one halts the query. SELECT C_FirstName, C_LastName, C_UserName, TABLE function and where clause parameters retrieving. The optimizer doesn't understand correctly this type of clause. Oracle timestamp sql query. Introduction to SQL WHERE clause. Creating dynamic SQL need little trick and multiple steps. 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. The SQL CASE statement specifies a conditional expression to perform different actions depending on the input expression value. and ( @fromDate is null or [dateField] >= @fromDate) and ( @ Oracle PL/SQL. So, putting a CASE expression into the WHERE clause as you There are four field in the page lets say. How to select from SQL table WHERE a TIMESTAMP is a specific Date. I used the . Date in where clause. Static SQL conditional WHERE clause from a Function. Stored Procedure dynamic / generic where. start_date ELSE EDIT: Adding link to similar question/answer with context as to why the union / ifelse approach works better than OR logic (FYI, Remus, the answerer in this link, used to work on the SQL Server team developing service broker and other technologies). Conditional WHERE clause. start_date = p. To actually remove any or all NULL conditions, you need dynamic SQL. Oracle SQL Case Statement in Where Clause. sample_column1 =NVL(t. id=emp. Chris Saxon. The SQL query is: IF(@CustomerType = Blank) BEGIN Select * From Customer Where (CustomerType I am creating a SQL query in which I need a conditional where clause. If the value of the variable is null then the second condition should not be included in the criteria. The following illustrates the syntax of the WHERE clause in the SELECT statement:. 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. Summary: in this tutorial, you will learn how to use the SQL WHERE clause to filter rows based on specified conditions. on syntax anywhere. Please Your best bet for this is to use dynamic SQL Build up your select statement in a string, then use execute immediate to run the query as below. And the :parameter is optional, meaning if :parameter is null, include row in result. The Oracle WHERE clause is used to filter the results from a SELECT, INSERT, UPDATE, or In this article, we discussed various methods for implementing IF or IF-ELSE logic in an SQL WHERE clause. I don't want to have a separate statement and basically here what I want to 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. December 7, 2023 | 8 minute read. Hello Tom Is it possible to change the where condition (using case statement) based on certain variable? For example var T varchar2(1) exec :T := 'E'; var E number; exec :E := 7788; var N varchar2(20) exec :N := 'MILLER'; select empno, ename from emp where -- how to use case statement to vary the condition based on :T -- if :T = 'E' then the condition should be Now, order by clause use an expression and order rows upon it. The goal with this WHERE clause is to filter the result set on p_DrumNo if it´s passed in to the Stored Procedure. 0. There's a WHERE clause that I want to control based on this param. How to extract time from a date column in the where clause in ORACLE? 0. Great, the plan is a Full table scan (FTS) and that plan is cached and you get all the rows back in 5 minutes. 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 hiredate sal comm deptno ----- ----- ----- ----- ----- ----- ----- ----- 7369 smith clerk 7902 17-dec-80 800 20 7900 james clerk 7698 03-dec-81 950 30 7876 adams clerk 7788 23-may-87 1100 20 Eg, in postgres, the plan will contain a join clause, even if you didn't use the join. How to pass a date in query. Sign up or Conditional WHERE Clauses in SQL Server 2008. ORDERDELIVERY is just a ~temporary table containing ORDER_IDs related to the parameter p_DrumNo. Using Dates in Oracle SQL. The database processes the expression from top-to-bottom. SOME_TYPE NOT LIKE 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: SearchCountry When restricting data based on a parameter I usually use the following: AND p. Main idea is to generate a sql based on inputs dynamically. ; SQL Conditional Join if Empty- Join tables if no matching record exists in the second This SQL tutorial will guide you on conditionally filtering using the WHERE clause using a SQL CASE statement. 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. Stack Overflow. Using the AND operator, you may chain as many conditions as you want. SOME_TYPE LIKE 'NOTHING%') OR (T2. To learn more, see our tips on writing great answers. Dynamic SQL allows you to tailor the query while accommodating numerous paths. Assignee, Add column to condition based on parameter value SQL. sample_column1, **SOME LOGIC**); you can have case construct in the order by clause :. mdfmqvtla gno hjvphd lke cwbhkcg ripm vsll wbsqvsfl fqtxwe voni