show collation;
Collation	Charset	Id	Default	Compiled	Sortlen
utf8mb4_general_ci	utf8mb4	45	Yes	Yes	1
utf8mb4_bin	utf8mb4	46		Yes	1
binary	binary	63	Yes	Yes	1
gbk_chinese_ci	gbk	28	Yes	Yes	1
gbk_bin	gbk	87		Yes	1
utf16_general_ci	utf16	54	Yes	Yes	1
utf16_bin	utf16	55		Yes	1
gb18030_chinese_ci	gb18030	248	Yes	Yes	1
gb18030_bin	gb18030	249		Yes	1
latin1_swedish_ci	latin1	8	Yes	Yes	1
latin1_bin	latin1	47		Yes	1
gb18030_2022_bin	gb18030_2022	216		Yes	1
gb18030_2022_chinese_ci	gb18030_2022	217	Yes	Yes	1
gb18030_2022_chinese_cs	gb18030_2022	218		Yes	1
gb18030_2022_radical_ci	gb18030_2022	219		Yes	1
gb18030_2022_radical_cs	gb18030_2022	220		Yes	1
gb18030_2022_stroke_ci	gb18030_2022	221		Yes	1
gb18030_2022_stroke_cs	gb18030_2022	222		Yes	1
show collation;
Collation	Charset	Id	Default	Compiled	Sortlen
utf8mb4_general_ci	utf8mb4	45	Yes	Yes	1
utf8mb4_bin	utf8mb4	46		Yes	1
binary	binary	63	Yes	Yes	1
gbk_chinese_ci	gbk	28	Yes	Yes	1
gbk_bin	gbk	87		Yes	1
utf16_general_ci	utf16	54	Yes	Yes	1
utf16_bin	utf16	55		Yes	1
gb18030_chinese_ci	gb18030	248	Yes	Yes	1
gb18030_bin	gb18030	249		Yes	1
latin1_swedish_ci	latin1	8	Yes	Yes	1
latin1_bin	latin1	47		Yes	1
gb18030_2022_bin	gb18030_2022	216		Yes	1
gb18030_2022_chinese_ci	gb18030_2022	217	Yes	Yes	1
gb18030_2022_chinese_cs	gb18030_2022	218		Yes	1
gb18030_2022_radical_ci	gb18030_2022	219		Yes	1
gb18030_2022_radical_cs	gb18030_2022	220		Yes	1
gb18030_2022_stroke_ci	gb18030_2022	221		Yes	1
gb18030_2022_stroke_cs	gb18030_2022	222		Yes	1
show collation test;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your OceanBase version for the right syntax to use near 'test' at line 1
SHOW CHARACTER SET;
Charset	Description	Default collation	Maxlen
binary	Binary pseudo charset	binary	1
utf8mb4	UTF-8 Unicode	utf8mb4_general_ci	4
gbk	GBK charset	gbk_chinese_ci	2
utf16	UTF-16 Unicode	utf16_general_ci	2
gb18030	GB18030 charset	gb18030_chinese_ci	4
latin1	cp1252 West European	latin1_swedish_ci	1
gb18030_2022	GB18030-2022 charset	gb18030_2022_chinese_ci	4
SHOW CHARACTER SET;
Charset	Description	Default collation	Maxlen
binary	Binary pseudo charset	binary	1
utf8mb4	UTF-8 Unicode	utf8mb4_general_ci	4
gbk	GBK charset	gbk_chinese_ci	2
utf16	UTF-16 Unicode	utf16_general_ci	2
gb18030	GB18030 charset	gb18030_chinese_ci	4
latin1	cp1252 West European	latin1_swedish_ci	1
gb18030_2022	GB18030-2022 charset	gb18030_2022_chinese_ci	4
SHOW CHARACTER SET test;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your OceanBase version for the right syntax to use near 'test' at line 1
set names utf8;
set names utf8;
set names;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your OceanBase version for the right syntax to use near 'names' at line 1
SET SESSION TRANSACTION ISOLATION LEVEL READ COMMITTED;
SET SESSION TRANSACTION ISOLATION LEVEL READ COMMITTED;
SET SESSION TRANSACTION ISOLATION LEVEL READ COMMITTED test;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your OceanBase version for the right syntax to use near 'test' at line 1
show girls;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your OceanBase version for the right syntax to use near 'girls' at line 1
show   girls;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your OceanBase version for the right syntax to use near 'girls' at line 1
show girls test;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your OceanBase version for the right syntax to use near 'girls test' at line 1