In the Common Table Expression (CTE), select the ROW_NUMBER (), partitioned by the group column and ordered in the desired order. Then SELECT only the records that have ROW_NUMBER () = 1:
Full Answer
What is the best way to query Salesforce?
The Salesforce Object Query Language or SOQL is the one you are going to use to query the Salesforce sObject layer for specific information. It has a SQL-like syntax that supports only SELECT statements (Read-only). Developer tools e.g. Eclipse, Visual Studio, Salesforce developer console, etc.
Why can't I see my organization's Records in Salesforce?
Ask your Salesforce system administrator if any changes have been made to the organization's sharing rules that would affect your visibility into the records. Note: It may be helpful to have a system administrator or other User with View All access in the organization perform the search.
What is soql query string in Salesforce?
SOQL is similar to the SELECT statement in the widely used Structured Query Language (SQL) but is designed specifically for Salesforce data. With SOQL, you can construct simple but powerful query strings in the following environments: In the queryString parameter in the query () call
How many records can be processed in Salesforce apex?
Using Batch Apex upto 50 million records can be processed. You can read more on than that in Apex documentaion. Previously, each individual record matched by the SOQL COUNT () and COUNT (fieldName) functions counted toward the query row limit.
How do I select unique records in SOQL?
SELECT count(Id), Name FROM Participant__c GROUP BY Name To access the unique names in Apex, you could do something like this or simply use sets.
How can we fetch the unique records from the table?
The SELECT DISTINCT statement is used to return only distinct (different) values. Inside a table, a column often contains many duplicate values; and sometimes you only want to list the different (distinct) values.
How do I use alias in SOQL query?
You can use alias notation in SELECT queries. To establish the alias, first identify the object, in this example a contact, and then specify the alias, in this case “c.” For the rest of the SELECT statement, you can use the alias in place of the object or field name.
How do I use GROUP BY in Salesforce?
You can use the GROUP BY option in a SOQL query to avoid iterating through individual query results. That is, you specify a group of records instead of processing many individual records. fieldGroupByList specifies a list of one or more fields, separated by commas, that you want to group by.
How can I get unique records without distinct in SQL?
For example, if we wish to print unique values of “FirstName, LastName and MobileNo”, we can simply group by all three of these....Below are alternate solutions :Remove Duplicates Using Row_Number. ... Remove Duplicates using self Join. ... Remove Duplicates using group By.
How do you remove duplicates in SQL query?
SQL delete duplicate Rows using Common Table Expressions (CTE)WITH CTE([firstname],AS (SELECT [firstname],ROW_NUMBER() OVER(PARTITION BY [firstname],ORDER BY id) AS DuplicateCount.FROM [SampleDB].[ dbo].[ employee])
How do I query Sobject in Salesforce?
If you have the sobject name in a string, e,g, 'sobjname', you can then query back the record via something like: String queryStr='select id from ' + sobjname; List
Is user alias unique in Salesforce?
Hi, No Alias is not unique, but is a required field when creating user via Salesforce UI. Additionally its short name to identify user on list pages, reports, and other pages where the entire name does not fit. Up to eight characters are allowed in this field.
What is SOSL and SOQL in Salesforce?
A SOQL query is the equivalent of a SELECT SQL statement and searches the org database. SOSL is a programmatic way of performing a text-based search against the search index. Whether you use SOQL or SOSL depends on whether you know which objects or fields you want to search, plus other considerations.
What is SOSL in Salesforce?
Salesforce Object Search Language (SOSL) is a Salesforce search language that is used to perform text searches in records. Use SOSL to search fields across multiple standard and custom object records in Salesforce. SOSL is similar to Apache Lucene.
Can we GROUP BY two columns in SOQL?
SOQL does support grouping by multiple fields. The grouping order is from left to right. Example!
How do I count SOQL queries?
To discover the number of rows that a query returns, use the aggregate function COUNT() in a SELECT statement of a SOQL query. Use one of the following forms of syntax for COUNT() : COUNT() COUNT( fieldName )
What is SOQL in Salesforce?
Use the Salesforce Object Query Language (SOQL) to search your organization’s Salesforce data for specific information. SOQL is similar to the SELECT statement in the widely used Structured Query Language (SQL) but is designed specifically for Salesforce data.
How to use SOQL?
When to Use SOQL 1 Retrieve data from a single object or from multiple objects that are related to one another. 2 Count the number of records that meet specified criteria. 3 Sort results as part of the query. 4 Retrieve data from number, date, or checkbox fields.
Can SOQL be used to perform arbitrary join operations?
For example, you can’t use SOQL to perform arbitrary join operations, use wildcards in field lists, or use calculation expressions. SOQL uses the SELECT statement combined with filtering statements to return sets of data, which can optionally be ordered: SELECT one or more fields. FROM an object.
What is SOQL in Salesforce?
The Salesforce Object Query Language or SOQL is the one you are going to use to query the Salesforce sObject layer for specific information. It has a SQL-like syntax that supports only SELECT statements (Read-only).
What is Salesforce Object?
At the core of the Salesforce data model is something referred to as the Salesforce Object or sObject. sObject has a table-like data structure. It’s organized into a concept of Records and Fields which are similar to columns in a database table.
When to use inner query?
An Inner Query is normally used when you want to retrieve the related child record for a particular parent record or set of parent records. For example, to pull the Contacts related to a particular Account, you can use the following SOQL query:
Is Salesforce a CRM?
Salesforce is a cloud-based CRM platform where you can store a bunch of data and one that gives you access to this data from any location in the world. Whether it’s Sales, Marketing, or anything else you use to connect with your customers, it is possible using the Salesforce platform.
Option 1: SELECT DISTINCT
This is the most simple and straight forward, but also the most limited way:
Option 2: GROUP BY
Grouping allows you to add aggregated data, like the min (id), max (id), count (*), etc:
Option 3: Subquery
Using a subquery, you can first identify the duplicate rows to ignore, and then filter them out in the outer query with the WHERE NOT IN (subquery) construct:
Why did this happen to begin with?
Because some of the options for recovering the data are time sensitive, we do recommend that you look into the recovery first or at least in conjunction with your investigation into why it happened. Here are some things to look into as potential causes for records to be deleted:
Related Information: Variations of Deletion behavior
If a child record (like a Contact or Opportunity) is deleted and the parent record is subsequently deleted (Like the Account), the child record is permanently deleted. Even if the parent record is undeleted, the child record cannot be recovered, but if the child record is undeleted first this won't happen.
