b18030;
CREATE TABLE t2a (c CHAR(1) PRIMARY KEY) DEFAULT CHARSET = gb18030;
CREATE TABLE t2b (c CHAR(1) PRIMARY KEY) DEFAULT CHARSET = gb18030;
INSERT INTO t1a VALUES ('双'), ('字'), ('𤈼'), ('𠻟');
INSERT INTO t1b VALUES ('双');
INSERT INTO t2a VALUES ('𠻠'), ('