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Results for “expression”

Small, practical examples. Search by task or narrow things down below.

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SQL ServerGetting Started

Calculate a value with SELECT

SQL Server: Evaluate a small arithmetic expression on the database server.

SQL Server✓ Tested
PostgresGetting Started

Calculate a value with SELECT

Postgres: Evaluate a small arithmetic expression on the database server.

Postgres✓ Tested
SQLiteGetting Started

Calculate a value with SELECT

SQLite: Evaluate a small arithmetic expression on the database server.

SQLite✓ Tested
JavaText validation & formatting

Check a string prefix

Java: Use startsWith to check a literal Java prefix without a regular expression.

Java✓ Tested
PowerShellArray operations

Count a result even when it is empty or has one item

PowerShell: Wrap pipeline results in an array subexpression for consistent Count behavior.

PowerShell✓ Tested
SQLExpressions & aggregates

Count rows per category

Aggregate rows sharing the same category.

GROUP BY✓ Tested
SQLReporting & grouped calculations

Count rows satisfying separate conditions

SQL: SUM over CASE expressions calculates several conditional counts in one scan.

SQL✓ Tested
SQL ServerReporting & grouped calculations

Count rows satisfying separate conditions

SQL Server: SUM over CASE expressions calculates several conditional counts in one scan.

SQL Server✓ Tested
PostgresReporting & grouped calculations

Count rows satisfying separate conditions

Postgres: SUM over CASE expressions calculates several conditional counts in one scan.

Postgres✓ Tested
SQLiteReporting & grouped calculations

Count rows satisfying separate conditions

SQLite: SUM over CASE expressions calculates several conditional counts in one scan.

SQLite✓ Tested
C#Types & reliable control flow

Create a modified copy of an immutable record

C#: A with expression creates a shallow copy with selected changed properties.

C#✓ Tested
SQLExpressions & aggregates

Filter aggregate groups

Keep only categories with multiple products.

HAVING✓ Tested