CREATE DATABASE db1;
CREATE DATABASE db2;
CREATE TABLE db1.t1 (f1 INTEGER) ENGINE=InnoDB;
CREATE TABLE db2.t2A (f1 INTEGER) ENGINE=InnoDB;
CREATE TABLE db2.t2B (f1 INTEGER) ENGINE=InnoDB;
INSERT INTO db1.t1 VALUES (1);
INSERT INTO db2.t2A VALUES (2);
INSERT INTO db2.t2B VALUES (3);
SELECT COUNT(*) = 0 FROM db1.t1;
COUNT(*) = 0
1
SELECT COUNT(*) = 0 FROM db2.t2A;
COUNT(*) = 0
1
SELECT COUNT(*) = 1 FROM db2.t2B;
COUNT(*) = 1
1
SELECT COUNT(*) = 0 FROM db1.t1;
COUNT(*) = 0
1
SELECT COUNT(*) = 1 FROM db2.t2A;
COUNT(*) = 1
1
SELECT COUNT(*) = 1 FROM db2.t2B;
COUNT(*) = 1
1
DROP SCHEMA db1;
DROP SCHEMA db2;