Query Builder

Overview

The Query Builder is SigNoz's structured query interface that combines the power of expression-based querying with intelligent auto-completion. Whether you're troubleshooting production issues, analyzing performance trends, or creating custom dashboards, the Query Builder gives you the flexibility to write sophisticated search expressions, aggregations, and filtering logic while providing contextual suggestions.

What you'll learn:

• How to filter data with precision using multiple criteria
• Advanced aggregation techniques for meaningful insights
• Performance optimization tips for large datasets

Quick Start

Your First Query

Let's start with a practical example. Suppose you want to find all error spans from your recommendationservice service in the last 6 hours:

1. Navigate to Traces → Explorer
2. Write filter expression: service.name = 'recommendationservice' AND has_error = true
3. Set time range: Last 6 hours
4. Run query to see results instantly

Notice how you can write logical expressions directly, with auto-completion helping you discover available attributes and operators as you type. This basic pattern—filter, refine, visualize—forms the foundation of all Query Builder operations.

Filtering:

Filtering is your first line of defense against data overload. The Query Builder supports sophisticated filtering that goes beyond simple equality checks. Learn more about search syntax here

Aggregation & Grouping: Extracting Insights

Transform raw data into actionable insights using SigNoz's comprehensive aggregation functions.

Core Aggregation Functions

Statistical Functions

• Count: Total occurrences count()
• Count Distinct: Unique values count_distinct(user_id, product_id)
• Sum: Numerical totals sum(bytes_sent)
• Average: Mean values avg(response_time_ms)
• Min/Max: Range boundaries min(latency), max(latency)

Advanced Functions

• Percentiles: Distribution analysis p50(response_time_ms), p95(response_time_ms), p99(response_time_ms)
• Rate: Total occurrences per time unit rate()
• Rate Sum: Change in totals rate_sum(requests)
• Rate Average: Change in averages rate_avg(bytes_sent)

Grouping

Grouping transforms aggregations from single values into comparative datasets:

Real-World Examples: Cart Service Analytics

Example 1: Product Popularity Analysis

• Goal: Identify which products are being added to carts most frequently
• Insight: Top 5 most popular products being added to shopping carts

Example 2: User Shopping Behavior

• Goal: Analyze quantity patterns per user to identify bulk buyers
• Insight: Users adding large quantities (potential bulk buyers or businesses)

Example 3: Cart Activity Timeline

• Goal: Track cart additions over time to understand shopping patterns
• Insight: Shopping patterns throughout the day

Example 4: Average Quantity per Product

• Goal: Understand typical purchase quantities for different products
• Insight: Products typically bought in larger quantities vs. single items

How Grouping Handles Missing Values

When you group data and some records don't have the grouping key:

• These records get grouped under an "empty" value
• Your results will show groups with blank/empty labels

Example: Grouping users by department:

• Users with no department → grouped as "" (empty)
• Users with department → grouped normally ("Sales", "Marketing", etc.)

To exclude empty groups: Add key EXISTS to your search:

department EXISTS AND [rest of your query]

Important: We don't automatically exclude empty groups because sometimes you want to see them (e.g., finding users without departments).

Result Manipulation: Refining Your Analysis

Fine-tune your query results with result manipulation options that help you focus on what matters most.

Sorting & Limiting

Order By: Control result ordering

• Ascending: avg(response_time) asc
• Descending: count() desc
• Multiple: sum(quantity) desc, userId asc

Limit: Focus on top results

• Top performers: LIMIT 10
• Combined with ordering for "Top N" analysis

How Limit Works for Time Series

When you apply a limit to a time series query with group by fields, the limit determines which groups (series) are included in the results:

1. Without limit or limit = 0: All groups matching your filter are included
2. With limit > 0: Only the top N groups are included based on your ordering

Behind the Scenes

When a limit is specified with group by:

1. First, a query runs to identify the top N groups based on:

   • Your aggregation (e.g., count(), sum(duration))
   • Your ordering (e.g., order by count() desc)
   • The entire time range

2. Then, the time series query runs but only includes data for those top N groups

Example

Query: count() by service.name
Time Range: Last 24 hours
Limit: 5
Order: count() desc

Result: Time series data for only the 5 services with the highest total count over 24 hours

Important Notes

• The limit applies to the number of series (groups), not individual data points
• The "top N" selection is based on the aggregate value across the entire time range, not per time bucket
• Without group by, limit has no effect on time series queries
• Each group selected will have data points for all time intervals in your query range

Conditional Filtering with Having

Use Having clause to filter aggregated results:

Aggregation: count()
Group By: endpoint
Having: count() > 1000 AND count() < 5000
Result: Only endpoints with more than 1000 requests and less then 5000 requests

Common Having Patterns:

• High-traffic endpoints: count() > 10000
• Slow operations: avg(duration) > 500
• Error-prone services: sum(errors) > 10

Combining Multiple Conditions:

Use parentheses with AND/OR operators to create complex conditions:

Having: (count() > 1000) AND (count() < 5000)

Note: Always use parentheses when combining conditions to ensure correct evaluation order, especially when mixing AND and OR operators.

Time Aggregation Windows

When querying time series data (traces, logs, or metrics), the system automatically manages the step interval (also known as aggregation interval) to ensure optimal performance and visualization. The step interval determines how data points are aggregated over time.

Automatic Step Interval Assignment

If you don't specify a step interval in your query, the system automatically calculates an optimal value based on:

• The time range of your query (end time - start time)
• The type of data you're querying (traces/logs vs metrics)
• A target of approximately 300 data points for optimal visualization

Step Interval Limits

To prevent performance issues and ensure responsive queries, the system enforces a maximum of 1,500 data points per series. If your specified step interval would result in more than 1,500 points, it will be automatically adjusted upward. The behavior is different by telemetry data type

Traces and Logs

Minimum step interval: 5 seconds

Calculation rules:

• For automatic assignment: (time_range / 300) rounded down to nearest 5 seconds
• For limit enforcement: (time_range / 1500) rounded down to nearest 5 seconds
• The step interval is always a multiple of 5 seconds

Examples:

• 1 hour query → 12 second steps (300 points) → rounded down 10 second steps
• 24 hour query → 288 second steps (~5 minute steps, 300 points)
• If you set 1 second steps for a 1 hour query (3,600 points), it adjusts to 2.4 seconds → 5 seconds

Metrics

Minimum step interval: 60 seconds

Note: The 60-second minimum for metrics is being updated. Soon, you'll be able to set step intervals matching your collection interval, as long as the query stays within the 1,500 point limit. Follow progress on issue #7248

Calculation rules:

• Base calculation same as traces/logs but with additional adjustments:
  • For time ranges < 1 day: Multiple of 60 seconds
  • For time ranges 1-7 days: Multiple of 5 minutes (300 seconds)
  • For time ranges > 7 days: Multiple of 30 minutes (1,800 seconds)

Examples:

• 6 hour query → 72 seconds → 60 seconds (360 points)
• 3 day query → 864 seconds → 900 seconds (15 minutes, 288 points)
• 2 week query → 4,032 seconds → 3,600 seconds (1 hour, 336 points)

Best Practices

1. Let the system choose: For most use cases, don't specify a step interval. The automatic calculation provides a good balance between detail and performance.

2. Adjusting for more detail: If you need more granular data:

   • Reduce your time range
   • Or specify a smaller step interval (keeping in mind the 1,500 point limit)

Impact on Your Queries

• Filters: Applied regardless of step interval
• Group By: Each group counts toward the series limit
• Aggregations: Applied within each step interval window

Troubleshooting

"My specified step interval was ignored"

• Check if it would exceed 1,500 points
• Ensure it meets the minimum requirements (5s for traces/logs, 60s for metrics)

"I need more than 1,500 data points"

• Leave a comment here explaining your use case.

Legend Formatting

Create meaningful chart labels using template variables:

Format: {{service.name}}

Multi-Query Analysis: Advanced Comparisons

Combine multiple queries to perform sophisticated analysis that single queries cannot achieve.

Use Cases for Multiple Queries

Error Rate Calculation

• Query A: Count of error requests
• Query B: Count of all requests
• Formula: (A/B) * 100 (error percentage)

SLA Monitoring

• Query A: Requests under 200ms
• Query B: Total requests
• Formula: (A/B) * 100 (SLA compliance percentage)

Available Mathematical Functions in Formula

• Basic Operations: +, -, *, /
• Logarithmic: log, ln, log2, log10
• Exponential: exp, exp2, exp10
• Trigonometric: sin, cos, tan, asin, acos, atan
• Statistical: sqrt, cbrt
• Utility: now, degrees, radians

Multi-Query Best Practices

1. Align time ranges: Ensure all queries use the same time window
2. Consistent grouping: Use identical Group By clauses for meaningful comparisons

Troubleshooting & Performance

Common Query Issues

Query Performance Problems

• Symptom: Slow query execution
• Potential Solutions:
  • Check time range selection
  • Use resource attributes in WHERE clauses
  • Reduce GROUP BY cardinality
  • Increase aggregation intervals

No Results Returned

• Check: Filter syntax and attribute names
• Verify: Time range includes expected data
• Confirm: Service/attribute existence in the time period

Unexpected Results

• Review: Filter combinations (AND vs OR logic)
• Validate: Aggregation functions match your intent
• Check: Group By attributes for proper categorization

Performance Optimization

Query

1. Filter early: Apply restrictive filters first
2. Limit scope: Use specific time ranges
3. Resource attribute awareness: Leverage resource attributes to speed up queries
4. Aggregation efficiency: Choose appropriate time windows

Dashboard Performance

1. Adjust refresh frequency: Balance freshness with performance
2. Optimize time ranges: Avoid unnecessarily wide windows
3. Limit concurrent queries: Stagger dashboard loads

Last updated: August 1, 2025