tool.sql_queries.e85be025c0e6cfe4 SKILL.md skillA
tool.sql_queries.e85be025c0e6cfe4 from ai45lab/openart is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add ai45lab/openart/tool.sql_queries.e85be025c0e6cfe4@git:20260717.d255bbcPins git:20260717.d255bbc in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- ai45lab/openart
- Path
openart-tools/tool.sql_queries.e85be025c0e6cfe4/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260717.d255bbc, committed Jul 17, 2026
- Size
- 11,230 bytes
- Repository stars
- 271
- License
- AGPL-3.0
"\u8DE8\u6240\u6709\u4E3B\u8981\u6570\u636E\u4ED3\u5E93\u65B9\u8A00\uFF08\.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
Use this skill when the OpenART registry selects `tool.sql_queries.e85be025c0e6cfe4` for the current task.
# SQL 查询技能
跨所有主要数据仓库方言编写正确、高性能、可读的 SQL。
## 特定方言参考
### PostgreSQL（包括 Aurora、RDS、Supabase、Neon）
**日期/时间：**
```sql
-- 当前日期/时间
CURRENT_DATE, CURRENT_TIMESTAMP, NOW()
-- 日期算术
date_column + INTERVAL '7 days'
date_column - INTERVAL '1 month'
-- 截断到周期
DATE_TRUNC('month', created_at)
-- 提取部分
EXTRACT(YEAR FROM created_at)
EXTRACT(DOW FROM created_at) -- 0=星期日
-- 格式化
TO_CHAR(created_at, 'YYYY-MM-DD')
```
**字符串函数：**
```sql
-- 连接
first_name || ' ' || last_name
CONCAT(first_name, ' ', last_name)
-- 模式匹配
column ILIKE '%pattern%' -- 不区分大小写
column ~ '^regex_pattern$' -- 正则
-- 字符串操作
LEFT(str, n), RIGHT(str, n)
SPLIT_PART(str, delimiter, position)
REGEXP_REPLACE(str, pattern, replacement)
```
**数组和 JSON：**
```sql
-- JSON 访问
data->>'key' -- 文本
data->'nested'->'key' -- json
data#>>'{path,to,key}' -- 嵌套文本
-- 数组操作
ARRAY_AGG(column)
ANY(array_column)
array_column @> ARRAY['value']
```
**性能提示：**
- 使用 `EXPLAIN ANALYZE` 分析查询
- 在经常过滤/关联的列上创建索引
- 对相关子查询使用 `EXISTS` 而非 `IN`
- 对常见过滤条件使用部分索引
- 使用连接池处理并发访问
---
### Snowflake
**日期/时间：**
```sql
-- 当前日期/时间
…Read the whole file at its exact version.
How to install
mdr add ai45lab/openart/tool.sql_queries.e85be025c0e6cfe4@sha256:37d998f93206531fThe line at the top of this page pins the label git:20260717.d255bbc, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_osbmt4cq3vouve6p)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Jul 17, 2026.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (11230 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
ai45lab/openart · 271 stars · license AGPL-3.0 · pushed 2026-11-02 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_osbmt4cq3vouve6p GET https://markdownregistry.com/api/v1/resolve?ref=ai45lab/openart/tool.sql_queries.e85be025c0e6cfe4 GET https://markdownregistry.com/api/v1/blob/37d998f93206531ffb2c5354f86c54d3904ca054c2d39f235d990f879df52210
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.