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- 101 Questions & Answers
- Last Update: Nov 12, 2026
An API frequently filters a JSON payload by a customer tier nested inside a document
Which SQL design or implementation decision most directly addresses this requirement?
An indexed computed expression can make frequently queried JSON properties searchable instead of repeatedly parsing and scanning.
Database check predicates reject invalid stored values regardless of which client sent the write.
A primary key uniquely identifies each row and provides a reference target; its underlying index strategy is a separate design choice.
Unicode-capable character types retain characters outside a single legacy code page and require appropriate length planning.
A SQL workload's throughput drops after reducing a database compute tier to save cost
After the team applies the intended design, which observation would most directly verify that the specific requirement was met?
Saving compute cost is not safe if CPU, IO or memory limits violate service-level objectives.
Optimistic versioned isolation can reject overlapping writes, requiring idempotent retry or conflict resolution.
SQL may abort one deadlock participant; retries can succeed but must not repeat non-idempotent side effects.
A cached plan based on one parameter distribution may be unsuitable for another; forced plans or hints need evidence.
A query builder needs to know how many elements an SQL vector contains before invoking an embedding function
Which SQL design or implementation decision most directly addresses this requirement?
Vector properties help validate dimensions and related characteristics before comparison or indexing.
RRF combines positional rankings and avoids directly adding incompatible score scales.
Near-duplicate chunks can crowd top-K slots and lower answer coverage even with accurate vector ranking.
Semantic relevance does not replace mandatory structured filters such as date, category or tenant.
Only active customer records are read frequently while archived records dominate a table
Which SQL design or implementation decision most directly addresses this requirement?
A predicate-limited index has fewer rows to maintain and can serve a matching selective WHERE clause.
JSON storage supports evolving attributes, but constraints and relational columns should still enforce critical business invariants.
In-Memory OLTP reduces certain latch and lock bottlenecks but has feature and capacity constraints that require workload testing.
Persisting an offset or normalized instant helps prevent ambiguity that occurs with unqualified local DATETIME values.
A shipping weight is sometimes ingested as a negative number from a faulty device
After the team applies the intended design, which observation would most directly verify that the specific requirement was met?
Database check predicates reject invalid stored values regardless of which client sent the write.
Persisting an offset or normalized instant helps prevent ambiguity that occurs with unqualified local DATETIME values.
Sequences generate values independently of an individual table, unlike a column-specific identity, and can still exhibit gaps.
Approximate binary floating-point types cannot represent every decimal currency value exactly; fixed-precision decimal arithmetic avoids that category of rounding error.
A dashboard must compute a per-account child aggregation without a global group-by rewrite
Which SQL design or implementation decision most directly addresses this requirement?
A correlated subquery evaluates using the current outer-row key and may be optimized differently from explicit joins.
JSON_OBJECT produces correctly structured JSON property/value pairs and avoids manual quoting errors.
DENSE_RANK retains equal ranks for ties while the next distinct value advances by one.
OPENJSON shreds objects or arrays into rows and typed columns when a schema is supplied.
A platform is evaluating event-driven SQL change processing without frequent polling
After the team applies the intended design, which observation would most directly verify that the specific requirement was met?
CES can publish database changes into an event architecture, but supported platform and ordering guarantees must be checked.
GraphQL relationships make defined SQL relations traversable through the API without arbitrary client SQL.
DAB entity mapping and permissions limit accessible objects and operations, complementing SQL grants.
Configuration separation allows consistent entities while credentials and endpoints differ securely across environments.
A security team needs to query SQL performance logs alongside DAB request telemetry over a month
After the team applies the intended design, which observation would most directly verify that the specific requirement was met?
Log Analytics supports queryable cross-resource telemetry and Azure Monitor alerting.
Actionable alerts require measurable thresholds, destinations and noise controls rather than generic dashboards alone.
DAB can expose approved programmable objects while caller identity and database permissions enforce access.
DAB reads configuration to expose chosen database objects as endpoints, subject to role and permission controls.
Data owners must prioritize encryption, retention and restricted access for the most sensitive SQL columns
After the team applies the intended design, which observation would most directly verify that the specific requirement was met?
Information classification guides which columns require stricter access, masking, encryption and auditing.
Model-generated tool calls are untrusted and can misuse granted database permissions unless the tool boundary enforces policy.
Network restrictions limit reachability while scoped credentials decide who can invoke supported operations.
Server-side column encryption is different from Always Encrypted: the engine may decrypt for authorized server operations.
A scheduled deployment should use a known reviewed build rather than the latest unverified developer branch
Which SQL design or implementation decision most directly addresses this requirement?
Decoupling build and deploy improves traceability and avoids publishing unreviewed source.
A consistent schema artifact should be promoted while environment-specific values are provided securely at deployment.
CI can build frequently while CD must respect protected environments, approvals and test conditions.
Automated schema comparisons may propose destructive changes that need explicit approval and migration planning.
A customer-support model receives SQL rows but each row lacks a record identifier for attribution
After the team applies the intended design, which observation would most directly verify that the specific requirement was met?
Source metadata supports provenance checks and keeps generated statements linked to authorized records.
Cross-boundary model processing can violate residency or contractual restrictions even when SQL itself is secured.
RAG supplies relevant external context at answer time, reducing dependence on stale model memory but not guaranteeing truth.
Model output is untrusted data and must not be treated as authorized executable SQL.
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