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SELECT COUNT(*) FROM srcs.cm_user;--2494584记录
select * from srcs.cm_user的解析
SELECT STATEMENT, GOAL = ALL_ROWS 13272 2485876 415141292
TABLE ACCESS FULL SRCS CM_USER 13272 2485876 415141292
select * from (select * from srcs.cm_user)的解析
SELECT STATEMENT, GOAL = ALL_ROWS 13272 2485876 415141292
TABLE ACCESS FULL SRCS CM_USER 13272 2485876 415141292