UUID

SELECT uuid();

create.select(uuid()).fetch();

+--------------------------------------+
| uuid                                 |
+--------------------------------------+
| 1fc454e5-b9f6-4d55-b783-5987fe76cb45 |
+--------------------------------------+

uuid()

-- ACCESS
genguid()

-- ASE
newid(-1)

-- BIGQUERY
generate_uuid()

-- COCKROACHDB, POSTGRES
gen_random_uuid()

-- DB2
CAST(regexp_replace((hex(rand()) || hex(generate_unique())), '(.{8})(.{4})(.{4})(.{4})(.{12}).*', '$1-$2-$3-$4-$5') AS char(36))

-- DUCKDB, HSQLDB, MARIADB, MYSQL, TRINO
uuid()

-- FIREBIRD
uuid_to_char(gen_uuid())

-- H2
random_uuid()

-- HANA
CAST(replace_regexpr('(.{8})(.{4})(.{4})(.{4})(.{12}).*' IN CAST(sysuuid AS char(36)) WITH '\1-\2-\3-\4-\5') AS char(36))

-- ORACLE
CAST(regexp_replace(rawtohex(sys_guid()), '(.{8})(.{4})(.{4})(.{4})(.{12}).*', '\1-\2-\3-\4-\5') AS varchar2(36))

-- SNOWFLAKE
uuid_string()

-- SQLITE
(
  SELECT (((((substr(u, 1, 8) || '-') || (substr(u, 9, 4) || '-')) || (substr(u, 13, 4) || '-')) || (substr(u, 17, 4) || '-')) || substr(u, 21))
  FROM (
    SELECT lower(hex(randomblob(16))) u
  ) t
)

-- SQLSERVER
newid()

-- VERTICA
uuid_generate()

-- AURORA_MYSQL, AURORA_POSTGRES, DERBY, EXASOL, INFORMIX, MEMSQL, REDSHIFT, SQLDATAWAREHOUSE, SYBASE, TERADATA, 
-- YUGABYTEDB
/* UNSUPPORTED */