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How to execute a dynamic query in apex with the help of database class?
This function executes a string query, at the cost of total number of rows we can fetch in one execution of the class. The limit is 10,000 as compared to the 50,000 limit of the normal static query. In this example as you can see that we have not used the column name, however we have fetched it.
How to insert and update accounts in apex?
First, three Account sObjects are created and added to a list. An insert statement bulk inserts the list of accounts as an argument. Then, the second account record is updated, the billing city is updated, and the update statement is called to persist the change in the database. // Update account Acme2.
Can you change the value of a field in apex?
You see, Apex doesn’t respect sharing rules on fields. So if you actually implement this code, you would allow any user to modify the field value of any field – which is a huge security hole. Before setting the field value using dyanamic Apex, you must determine if the current user is allowed to view/modify that field value.
Can you write a soql query in apex?
Any Salesforce developer must be familiar with SOQL queries. SOQL as we all know is the Salesforce’s version of SQL. It’s full form translates to Salesforce Object Query Language. We have an idea about directly using query in APEX by writing the query in between ‘ [‘ and ‘]’.
When to use with security enforced in apex?
Use the WITH SECURITY_ENFORCED clause to enable field- and object-level security permissions checking for SOQL SELECT queries in Apex code, including subqueries and cross-object relationships. Apex generally runs in system context; that is, the current user’s permissions and field-level security aren’t taken into account during code execution.
Why do we need dynamic apex in Salesforce?
Dynamic apex help developers to create more flexible applications by providing them with the ability to access sObject and field metadata description,access salesforce app information, write dynamic SOQL queries, dynamic SOSL queries and dynamic DML.
What can you do with dynamic SOSL in apex?
Dynamic SOSL refers to the creation of a SOSL string at run time with Apex code. Dynamic SOSL enables you to create more flexible applications. For example, you can create a search based on input from an end user, or update records with varying field names.
How to work with very large soql queries?
Working with Very Large SOQL Queries Your SOQL query sometimes returns so many sObjects that the limit on heap size is exceeded and an error occurs. To resolve, use a SOQL query for loop instead, since it can process multiple batches of records by using internal calls to query and queryMore.
Can a column be used as a variable in apex?
We cannot use columns as variables, neither the conditions to be set or anything else. For this purpose we require a query which we can be generated as a string and then use it.