[SYMBOL] [A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [K] [L] [M] [N] [O] [P] [R] [S] [T] [U] [V] [W] [Y] Data Definition Language (DDL)  data dictionary, views, USER_UPDATABLE_COLUMNS  Data Manipulation Language  [See DML] data warehouse applications, group operations and  datatypes     DATE         converting          default format          internal storage format          NULL values and          specifying format      join conditions      object types          attributes          parameters          tables  DATE datatype     converting          errors      default format      format, specifying      internal storage format      NULL values and  dates     arithmetic         addition          overview          subtraction      format codes      formatting          case sensitivity      functions      interval data          INTERVAL DAY TO SECOND datatype          INTERVAL YEAR TO MONTH datatype      ISO standards         overview          weeks          years      literals      pivot tables, creating      ranges, SELECT statement      rounding/truncating      RTRIM function      summarizing by      time zones         database          overview          session      working days, calculating      years         AD/BC indicators          two-digit  DATETIME functions  days (working), calculating  DBA_UPDATABLE_COLUMNS data dictionary view  DBTIMEZONE function  DBTIMEZONE keyword  DDL (Data Definition Language)  Decision Support Systems (DSS)  DECODE function     divide by zero errors      errors      optional updates      result sets, transforming      selective aggregation      selective function execution      state, controlling      syntax  2nd      UPDATE statement  default date format  DELETE statement      DML (Data Manipulation Language)      join views      multiple-column subqueries      scalar subqueries  deleting     subpartitions      subtrees (hierarchical queries)  DENSE_RANK analytic function  DISTINCT keyword      aggregate functions  2nd      compared to EXISTS      non-equi self joins  divide by zero errors, avoiding  DML (Data Manipulation Language)      DELETE statement      INSERT statement      partitions, specifying      SELECT statement          clause references          DISTINCT keyword          ORDER BY clause          WHERE clause      statements         inline views          join views and      stored functions and      UPDATE statement  DSS (Decision Support Systems)     queries compared to SQL      SQL and