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--1.查看数据库里有哪些表有某个栏位
select table_name,column_name from all_tab_columns where column_name = upper('栏位名称');
select table_name,column_name from dba_tab_columns where column_name = upper('栏位名称');
--2.查看数据库里有多少个表有某个栏位
select count(*) from all_tab_columns where column_name = upper('栏位名称');
select count(*) from dba_tab_columns where column_name = upper('栏位名称');