oracle常用命令

1. 表信息：

    1 SELECT tabCols.COLUMN_NAME AS "Field",
    2        tabCols.DATA_TYPE || ‘(‘ || tabCols.DATA_LENGTH || ‘)‘ AS "Type",
    3        cons.constraint_type as "Key",
    4        tabCols.NULLABLE AS "Null",
    5        colcomments.comments AS "Comment"
    6   FROM USER_TAB_COLS tabCols
    7  inner JOIN user_col_comments colcomments
    8     ON colcomments.TABLE_NAME = tabCols.TABLE_NAME
    9    AND colcomments.COLUMN_NAME = tabCols.COLUMN_NAME
   10   left JOIN user_cons_columns conscols
   11     on conscols.TABLE_NAME = tabCols.TABLE_NAME
   12    AND conscols.COLUMN_NAME = tabCols.COLUMN_NAME
   13   left join user_constraints cons
   14     ON cons.constraint_name = conscols.constraint_name
   15  where tabCols.TABLE_NAME = ‘TBTEST‘

    

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