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Complete Guide: How to Use Mathematical Expressions and Aggregate Functions in SQL 2026

Complete Guide: How to Use Mathematical Expressions and Aggregate Functions in SQL 2026

Learning how to use mathematical expressions and aggregate functions in SQL is one of the most powerful and frequently used skills for developers, backend engineers, database administrators, data analysts, full-stack builders, DevOps professionals, startup founders, business intelligence specialists, and anyone turning raw database data into business insights in 2025–2026. Mastering how to use mathematical expressions and aggregate functions in SQL lets you perform calculations directly inside queries — compute revenue, profit margins, growth rates, averages, extremes, counts, inventory levels, pricing adjustments, and KPI summaries — without exporting data to spreadsheets or external tools.

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Amazon Linux 2023 — httpd — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Amazon Linux 2023

Amazon Linux 2023 — httpd — multiple vulnerabilities (20 CVEs) — patch and remediation guide

  • February 17, 2026
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Amazon Linux 2023 📖 ~4 min read  •  Source: Amazon Linux advisory ALAS2023-2025-1318 Related CVEs: CVE-2025-58098 CVE-2025-65082 CVE-2025-66200 CVE-2023-38709 CVE-2024-42516 CVE-2024-43204 CVE-2024-47252 CVE-2025-23048  +12 more Upstream summary: Apache HTTP Server 2.4.65 and earlier with Server Side Includes (SSI) enabled and mod_cgid (but […]

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FreeBSD 15 — tcpreplay — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 15

FreeBSD 15 — tcpreplay — multiple vulnerabilities (3 CVEs) — patch and remediation guide

  • February 17, 2026
  • BSD
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🟡 Medium   ⏱ 10–30 min  Last verified: 17 February 2026 Affected versions: FreeBSD 15 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: tcpreplay — Multiple vulnerabilities Related CVEs: CVE-2019-8376 CVE-2019-8377 CVE-2019-8381 Upstream summary: fklassen on Github reports: This release fixes the following security issues: memory access in do_checksum() NULL pointer dereference get_layer4_v6() […]

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FreeBSD 13 — git-svn — multiple vulnerabilities (8 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 13

FreeBSD 13 — git-svn — multiple vulnerabilities (8 CVEs) — patch and remediation guide

  • February 17, 2026
  • BSD
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🟡 Medium   ⏱ 10–30 min  Last verified: 17 February 2026 Affected versions: FreeBSD 13 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: git — multiple vulnerabilities Related CVEs: CVE-2024-50349 CVE-2024-52006 CVE-2025-27613 CVE-2025-27614 CVE-2025-46835 CVE-2025-48384 CVE-2025-48385 CVE-2025-48386 Upstream summary: Git development team reports: CVE-2025-27613: Gitk: When a user clones an untrusted repository and […]

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FreeBSD 15 — prozilla — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 15

FreeBSD 15 — prozilla — vulnerability — patch and remediation guide

  • February 17, 2026
  • BSD
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🟢 Low   ⏱ 5–15 min  Last verified: 17 February 2026 Affected versions: FreeBSD 15 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: ProZilla — server response buffer overflow vulnerabilities Related CVEs: CVE-2004-1120 Upstream summary: Buffer overflow vulnerabilities have been reported to exist in this software package. The vulnerabilities can be triggered by […]

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AlmaLinux 8 — perl-YAML-LibYAML — vulnerability — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — perl-YAML-LibYAML — vulnerability — patch and remediation guide

  • February 17, 2026
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read  •  Source: AlmaLinux ALSA ALSA-2025:9329 Related CVEs: CVE-2025-40908 Upstream summary: Kirill Siminov's "libyaml" is arguably the best YAML implementation. The C library is written precisely to the YAML 1.1 specification. It was originally bound to Python […]

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FreeBSD 15 — jetty — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 15

FreeBSD 15 — jetty — multiple vulnerabilities (4 CVEs) — patch and remediation guide

  • February 17, 2026
  • BSD
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🟡 Medium   ⏱ 10–30 min  Last verified: 17 February 2026 Affected versions: FreeBSD 15 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: jetty — multiple vulnerability Related CVEs: CVE-2007-5613 CVE-2007-5614 CVE-2007-5615 CVE-2007-6672 Upstream summary: Greg Wilkins reports: jetty allows remote attackers to bypass protection mechanisms and read the source of files via […]

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FreeBSD 15 — py38-beaker — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 15

FreeBSD 15 — py38-beaker — vulnerability — patch and remediation guide

  • February 17, 2026
  • BSD
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🟢 Low   ⏱ 5–15 min  Last verified: 17 February 2026 Affected versions: FreeBSD 15 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: py-beaker — arbitrary code execution vulnerability Related CVEs: CVE-2013-7489 Upstream summary: matheusbrat reports: The Beaker library through 1.12.1 for Python is affected by deserialization of untrusted data, which could lead […]

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FreeBSD 15 — libzmq — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 15

FreeBSD 15 — libzmq — multiple vulnerabilities (4 CVEs) — patch and remediation guide

  • February 17, 2026
  • BSD
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🟡 Medium   ⏱ 10–30 min  Last verified: 17 February 2026 Affected versions: FreeBSD 15 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: libzmq4 — Denial of Service Related CVEs: CVE-2014-9721 CVE-2019-13132 CVE-2019-6250 CVE-2020-15166 Upstream summary: Google's oss-fuzz project reports: Denial-of-Service on CURVE/ZAP-protected servers by unauthenticated clients. If a raw TCP socket is […]

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FreeBSD 15 — py37-pyrad — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 15

FreeBSD 15 — py37-pyrad — multiple vulnerabilities (2 CVEs) — patch and remediation guide

  • February 17, 2026
  • BSD
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🟢 Low   ⏱ 5–15 min  Last verified: 17 February 2026 Affected versions: FreeBSD 15 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: pyrad — multiple vulnerabilities Related CVEs: CVE-2013-0294 CVE-2013-0342 Upstream summary: Nathaniel McCallum reports: packet.py in pyrad before 2.1 uses weak random numbers to generate RADIUS authenticators and hash passwords, which […]

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