How do you bind variables in SOQL query?
A bind variable is an Apex variable that you use in a SOQL query. Use bind variables as placeholders for specific values to be provided later….Let’s look at this in action.
- In your Trailhead Playground, click.
- Click Property Explorer.
- Move the left slider from 200K to 550K.
- Move the right slider from 1.2M to 800K.
What approach must you use to implement a dynamic SOQL query at runtime in Apex?
To create a dynamic SOQL query at run time, use the database query method, in one of the following ways.
- Return a single sObject when the query returns a single record: sObject s = Database.
- Return a list of sObjects when the query returns more than a single record: List sobjList = Database.
What is static SOQL and dynamic SOQL?
Static SOQL is one which you write in square brackets. It is good to use when you didn’t have any dynamic changes in the soql query. For example: list con=[Select Id, LastName from Contact] Dynamic SOQL refers to the creation of a SOQL string at runtime with Apex code.
How do I write a SOQL query in a string?
String field = ‘fieldx__c’; Strign soqlQuery = ‘select Id,’+field+’,Name from object__c’; object__c obj = database. query(soqlQuery);
Can you use a bind variable in dynamic soql?
You can use simple bind variables in dynamic SOQL query strings. The following is allowed: However, unlike inline SOQL, dynamic SOQL can’t use bind variable fields in the query string. The following example isn’t supported and results in a Variable does not exist error:
How are bind variables used in a query?
Each time a slider moves, its associated value is modified in the code through its bind variable. The query runs and adds the results to a list of properties displayed on the property explorer page. Using bind variables in the WHERE clause allows you to set variable values in your code before the query runs. Bind variables make a query dynamic.
How is a bind variable used in Salesforce?
Move the left slider from 200K to 550K. Move the right slider from 1.2M to 800K. Each time a slider moves, its associated value is modified in the code through its bind variable. The query runs and adds the results to a list of properties displayed on the property explorer page.
What are the results of a dynamic soql query?
Dynamic SOQL results can be specified as concrete sObjects, such as Account or MyCustomObject__c, or as the generic sObject data type. At run time, the system validates that the type of the query matches the declared type of the variable. If the query does not return the correct sObject type, a run-time error is thrown.