Requirements
- Target platform
- OpenClaw
- Install method
- Manual import
- Extraction
- Extract archive
- Prerequisites
- OpenClaw
- Primary doc
- SKILL.md
Tencent SkillHub · Data Analysis
Oracle DB
Write Oracle SQL and PL/SQL with proper syntax, hints, and performance patterns.
skill openclawclawhub Free
Write Oracle SQL and PL/SQL with proper syntax, hints, and performance patterns.
⬇ 0 downloads ★ 0 stars Unverified but indexed
Install for OpenClaw
Quick setup
- Download the package from Yavira.
- Extract the archive and review SKILL.md first.
- Import or place the package into your OpenClaw setup.
Package facts
- Download mode
- Yavira redirect
- Package format
- ZIP package
- Source platform
- Tencent SkillHub
- What's included
- SKILL.md
Validation
- Use the Yavira download entry.
- Review SKILL.md after the package is downloaded.
- Confirm the extracted package contains the expected setup assets.
Install with your agent
Agent handoff
Hand the extracted package to your coding agent with a concrete install brief instead of figuring it out manually.
- Download the package from Yavira.
- Extract it into a folder your agent can access.
- Paste one of the prompts below and point your agent at the extracted folder.
New install
I downloaded a skill package from Yavira. Read SKILL.md from the extracted folder and install it by following the included instructions. Tell me what you changed and call out any manual steps you could not complete.
Upgrade existing
I downloaded an updated skill package from Yavira. Read SKILL.md from the extracted folder, compare it with my current installation, and upgrade it while preserving any custom configuration unless the package docs explicitly say otherwise. Summarize what changed and any follow-up checks I should run.
Trust & source
Release facts
- Source
- Tencent SkillHub
- Verification
- Indexed source record
- Version
- 1.0.0
Provenance
- Publisher
- ivangdavila
- Source page
- View original listing
- Canonical URL
- Open canonical page
Documentation
Syntax Differences
ROWNUM for limiting rows—WHERE ROWNUM <= 10; 12c+ supports FETCH FIRST 10 ROWS ONLY DUAL table for expressions—SELECT sysdate FROM dual VARCHAR2 not VARCHAR—VARCHAR is reserved, VARCHAR2 is the standard String concatenation with ||—not CONCAT for multiple values Empty string equals NULL—'' IS NULL is true; breaks logic from other databases
Pagination
ROWNUM assigned before ORDER BY—wrap in subquery: SELECT * FROM (SELECT ... ORDER BY x) WHERE ROWNUM <= 10 Offset requires nested subquery: SELECT * FROM (SELECT a.*, ROWNUM rn FROM (...) a WHERE ROWNUM <= 20) WHERE rn > 10 12c+: OFFSET 10 ROWS FETCH NEXT 10 ROWS ONLY—cleaner, use when available
NULL Handling
NVL(col, default) for null replacement—faster than COALESCE for two args NVL2(col, if_not_null, if_null) for conditional—common Oracle pattern Empty string is NULL—LENGTH('') returns NULL, not 0 NULLIF(a, b) returns NULL if equal—useful for avoiding division by zero
Dates
SYSDATE for current datetime—no parentheses TO_DATE('2024-01-15', 'YYYY-MM-DD') for string to date—format required TO_CHAR(date, 'YYYY-MM-DD HH24:MI:SS') for date to string Date arithmetic in days—SYSDATE + 1 is tomorrow, SYSDATE + 1/24 is one hour
Sequences
Create: CREATE SEQUENCE seq_name START WITH 1 INCREMENT BY 1 Get next: seq_name.NEXTVAL—SELECT seq_name.NEXTVAL FROM dual Current value: seq_name.CURRVAL—only after NEXTVAL in same session 12c+: identity columns—GENERATED ALWAYS AS IDENTITY
Hierarchical Queries
CONNECT BY PRIOR child = parent for tree traversal START WITH parent IS NULL for root nodes LEVEL pseudo-column shows depth—WHERE LEVEL <= 3 limits depth SYS_CONNECT_BY_PATH(col, '/') builds path string
Bind Variables
Always use bind variables—literals cause hard parse every time PL/SQL: :variable_name syntax Performance critical—literal values fill shared pool, cause contention CURSOR_SHARING=FORCE as workaround but not recommended long-term
Hints
/*+ INDEX(table idx_name) */ forces index use /*+ FULL(table) */ forces full table scan /*+ PARALLEL(table, 4) */ enables parallel query Hints inside SELECT /*+ hint */—common placement after SELECT keyword
PL/SQL Blocks
Anonymous block: BEGIN ... END; with / on new line to execute DBMS_OUTPUT.PUT_LINE() for debug output—SET SERVEROUTPUT ON first Exception handling: EXCEPTION WHEN OTHERS THEN—always handle or log EXECUTE IMMEDIATE 'sql string' for dynamic SQL—beware injection
Transactions
No auto-commit by default—must COMMIT explicitly SAVEPOINT name then ROLLBACK TO name for partial rollback DDL auto-commits—CREATE TABLE commits any pending transaction SELECT FOR UPDATE WAIT 5 waits 5 seconds for lock—avoids indefinite hang
Performance
EXPLAIN PLAN FOR sql; SELECT * FROM TABLE(DBMS_XPLAN.DISPLAY)—shows plan V$SQL and V$SESSION for monitoring—requires privileges Avoid SELECT *—fetches all columns including LOBs Index hint when optimizer chooses wrong—/*+ INDEX(t idx) */
Common Traps
MINUS instead of EXCEPT—Oracle uses MINUS for set difference DECODE is Oracle-specific—use CASE for portability Implicit type conversion—WHERE num_col = '123' works but prevents index use ROWID is physical—don't store or rely on across transactions
Category context
Data access, storage, extraction, analysis, reporting, and insight generation.
Source: Tencent SkillHub
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Package contents
Included in package
1 Docs
- SKILL.md