sqlcount多表

⑴ SQL如何统计多表总记录数

你是指5张表的总记录还是相关的记录？
SELECT SUN(C) FROM (
SEELCT COUNT(*) C FROM TABLE1
UNION ALL
SEELCT COUNT(*) C FROM TABLE2
UNION ALL
SEELCT COUNT(*) C FROM TABLE3
UNION ALL
SEELCT COUNT(*) C FROM TABLE4
UNION ALL
SEELCT COUNT(*) C FROM TABLE5
);
或者：
SELECT COUNT(*) FROM TABLE1 A
INNER JOIN TABLE2 B ON A.ID=B.ID
INNER JOIN TABLE3 C ON C.ID=B.ID
INNER JOIN TABLE4 D ON D.ID=C.ID
INNER JOIN TABLE5 E ON E.ID=D.ID