Error: System.LimitException: Too many SOQL queries: 101

 Understanding the Error:

• Definition: This error occurs when your Apex code attempts to execute more than 100 SOQL (Salesforce Object Query Language) queries within a single execution context.






• Governor Limits: Salesforce enforces governor limits to safeguard platform performance and resource allocation.

Root Causes:

• Loops with SOQL Queries: Repetitive queries within loops quickly consume the limit.
• Unoptimized Triggers: Triggers handling bulk data operations without bulkification can trigger excessive queries.
• Excessive Sub-selects: SOQL queries within other SOQL queries count towards the limit.
• Insufficient Code Optimization: Inefficient code structure and query execution can contribute.

Solutions:

1. Eliminate SOQL Queries Within Loops:

   • Pre-fetch data into collections or maps before loops.
   • Use efficient data retrieval methods like containsKey in maps.

2. Bulkify Triggers:

   • Employ for loops and bulk DML operations to process multiple records at once.
   • Implement checks like Trigger.isExecuting and Trigger.isUpdate to prevent recursion.

3. Utilize @future Methods:

   • Offload tasks with intensive SOQL usage to @future methods, which have separate governor limits.

4. Consolidate Queries:

   • Combine multiple queries into fewer, more efficient ones using relationships and subqueries.
   • Avoid redundant queries for data already in memory.







5. Adhere to SOQL Best Practices:

   • Query only necessary fields using SELECT clauses.
   • Utilize indexes for faster query execution.
   • Minimize sub-selects.

Additional Tips:

• Review Code Thoroughly: Identify potential SOQL query overuse and refactor accordingly.
• Leverage Developer Tools: Use the Developer Console to analyze SOQL queries and pinpoint optimization opportunities.
• Explore Alternatives: Consider Declarative Lookup Rollup Summaries (DLRS) or external integrations for data retrieval when applicable.

Remember:

• Synchronous contexts have a SOQL query limit of 100, while asynchronous contexts have a limit of 200.
• Prioritize code optimization for efficient query usage and application performance.