oracle表类型、条件语句、循环语句(Oracle table types, conditional statements, loop statements).docVIP

oracle表类型、条件语句、循环语句(Oracle table types, conditional statements, loop statements).doc

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oracle表类型、条件语句、循环语句(Oracle table types, conditional statements, loop statements)

oracle表类型、条件语句、循环语句(Oracle table types, conditional statements, loop statements) One-dimensional table data types (understood as arrays) Cases: SET SERVEROUTPUT ON; DECLARE TYPE, tabletype1, IS, TABLE, OF, VARCHAR2 (20), INDEX, BY, BINARY_INTEGER, - binary integer index Table1 tabletype1; BEGIN Table1 (1): =zhangsan; Table1 (2): =lisi; DBMS_OUTPUT.PUT_LINE (table1 (1)||table1 (2) ||); END; SET SERVEROUTPUT ON; DECLARE TYPE, tabletype1, IS, TABLE, OF, VARCHAR2 (20), INDEX, BY, PLS_INTEGER; --PL/SQL integer index (faster than binary integer index) Table1 tabletype1; BEGIN Table1 (1): =zhangsan; Table1 (2): =lisi; DBMS_OUTPUT.PUT_LINE (table1 (1)||table1 (2) ||); END; SET SERVEROUTPUT ON; DECLARE TYPE, tabletype1, IS, TABLE, OF, VARCHAR2 (20), INDEX, BY, VARCHAR2 (10) - - string index Table1 tabletype1; BEGIN Table1 (first): =zhangsan; Table1 (second): =lisi; DBMS_OUTPUT.PUT_LINE (table1 (first) ||||table1 (second)); END; If the table type data is out of bounds, the no_data_found exception will appear, and we can capture and process this exception DECLARE TYPE, tabletype1, IS, TABLE, OF, VARCHAR2 (20), INDEX, BY, BINARY_INTEGER; Table1 tabletype1; BEGIN Table1 (1): =zhangsan; Table1 (2): =lisi; DBMS_OUTPUT.PUT_LINE (table1 (3)); EXCEPTION WHEN no_data_found THEN DBMS_OUTPUT.PUT_LINE ( does not exist with this data)! ); END; -- the related attributes of table type data: count, first, last, prior, next, these attributes return the index of the array. DECLARE TYPE, citytable, IS, TABLE, OF, VARCHAR2 (20), INDEX, BY, BINARY_INTEGER; Cities citytable; BEGIN Cities (1): = Harbin; Cities (2): = Beijing; Cities (3): = Shanghai; DBMS_OUTPUT.PUT_LINE (cities total:||cities.count); DBMS_OUTPUT.PUT_LINE (citiess first record:||cities.first); DBMS_OUTPUT.PUT_LINE (last record ofcities:||cities.last); DBMS_OUTPUT.PUT_LINE (citiess previous second record:||cities.prior (2)); DBMS_OUTPUT.PUT_LINE (the latter of the second record forcities:||cities.next (2)); END; Programming: when the

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