SQL 命令参考

本附录是 Halo 数据库 SQL 命令参考手册，覆盖 182 条 SQL 命令，按命令字母序与功能类别拆分为 6 个文件，便于在线浏览与 PDF 转换。

文件清单

文件	行数	命令数	覆盖范围
A1-ABORT到ANALYZE-ALTER系列.md	4488	44	ABORT、ALTER 全系列、ANALYZE
A2-BEGIN到COPY-事务与基础命令.md	968	9	BEGIN、CALL、CHECKPOINT、CLOSE、CLUSTER、COMMENT、COMMIT、COMMIT PREPARED、COPY
A3-CREATE对象定义-上.md	2192	16	CREATE ACCESS METHOD/AGGREGATE/CAST/COLLATION/CONVERSION/DATABASE/DOMAIN/EVENT TRIGGER/EXTENSION/FOREIGN DATA WRAPPER/FOREIGN TABLE/FUNCTION/GROUP/INDEX/LANGUAGE/MATERIALIZED VIEW
A4-CREATE对象定义-下-含TABLE与TYPE.md	3744	23	CREATE OPERATOR (CLASS/FAMILY)/POLICY/PROCEDURE/PUBLICATION/ROLE/RULE/SCHEMA/SEQUENCE/SERVER/STATISTICS/SUBSCRIPTION/TABLE/TABLE AS/TABLESPACE/TEXT SEARCH (CONFIGURATION/DICTIONARY/PARSER/TEMPLATE)/TRANSFORM/TRIGGER/TYPE
A5-CREATE-VIEW到DROP-VIEW-DROP系列.md	2496	51	CREATE USER (MAPPING)/VIEW、DEALLOCATE、DECLARE、DELETE、DISCARD、DO、DROP 全系列
A6-END到VALUES-查询与会话控制.md	4480	39	END、EXECUTE、EXPLAIN、FETCH、GRANT、IMPORT FOREIGN SCHEMA、INSERT、LISTEN、LOAD、LOCK、MOVE、NOTIFY、PREPARE (TRANSACTION)、REASSIGN OWNED、REFRESH MATERIALIZED VIEW、REINDEX、RELEASE SAVEPOINT、RESET、REVOKE、ROLLBACK (PREPARED/TO SAVEPOINT)、SAVEPOINT、SECURITY LABEL、SELECT (INTO)、SET (CONSTRAINTS/ROLE/SESSION AUTHORIZATION/TRANSACTION)、SHOW、START TRANSACTION、TRUNCATE、UNLISTEN、UPDATE、VACUUM、VALUES