DBMS_STATS常用方法（收集oracle信息）

–收集數據庫信息
EXEC DBMS_STATS.gather_database_stats;
EXEC DBMS_STATS.gather_database_stats(estimate_percent => 15);

–收集schema信息
EXEC DBMS_STATS.gather_schema_stats(‘SCOTT’);
EXEC DBMS_STATS.gather_schema_stats(‘SCOTT’, estimate_percent => 15);

–收集表信息
EXEC DBMS_STATS.gather_table_stats(‘SCOTT’, ‘EMPLOYEES’);
EXEC DBMS_STATS.gather_table_stats(‘SCOTT’, ‘EMPLOYEES’, estimate_percent => 15);

–收集index信息
EXEC DBMS_STATS.gather_index_stats(‘SCOTT’, ‘EMPLOYEES_PK’);
EXEC DBMS_STATS.gather_index_stats(‘SCOTT’, ‘EMPLOYEES_PK’, estimate_percent => 15);

–刪除收集信息
EXEC DBMS_STATS.delete_database_stats;
EXEC DBMS_STATS.delete_schema_stats(‘SCOTT’);
EXEC DBMS_STATS.delete_table_stats(‘SCOTT’, ‘EMPLOYEES’);
EXEC DBMS_STATS.delete_index_stats(‘SCOTT’, ‘EMPLOYEES_PK’);

–創建備份收集信息表
begin
dbms_stats.create_stat_table(USER,stattab => ‘STAT_TABLE’);
end;

–備份收集信息
BEGIN
dbms_stats.export_table_stats(USER,tabname => ‘FEI_T’,stattab => ‘STAT_TABLE’);
END;

–刪除收集信息
BEGIN
DBMS_STATS.delete_table_stats(USER,tabname => ‘FEI_T’);
END;

–導入收集信息
BEGIN
dbms_stats.IMPORT_TABLE_STATS(USER,’FEI_T’,stattab => ‘STAT_TABLE’);
END;

–說明：
當前用戶可以使用user代替用戶名
分析表相關對象信息cascade => true

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