Oracle® Database SQL Language Reference pptx

Tài liệu Oracle PL/SQL Language Pocket Reference- P15 pptx

... RETURN DATE; END; If you are using PL /SQL Release 2.1 or beyond, you can use this substitute for ADD_MONTHS in your SQL DML statements, as well as your PL /SQL programs: SELECT new_add_months ... and the earliest releases of the Oracle Server, when you called SYSDATE, PL /SQL issued an implicit cursor to the database to get the current date and time, as follows: SELECT SYSDATE FRO...

Ngày tải lên: 15/12/2013, 04:15

Tài liệu Oracle PL/SQL Language Pocket Reference- P18 pptx

... element can be referenced from other programs and PL/ SQL blocks. Private Defined only in the body of the package, but does not appear in the specification. A private element cannot be referenced ... package name, pets_inc, PL /SQL is not able to resolve the reference and the compile fails. So, the rule for referencing package elements is simple and clear: To reference a stored pac...

Ngày tải lên: 15/12/2013, 04:15

Tài liệu Oracle PL/SQL Language Pocket Reference- P22 pptx

... datatypes," in SQL Worksheet.[ 2] ) [2] SQL Worksheet is an SQL interpreter that ships with Oracle Enterprise Manager. SQL Worksheet has one significant advantage over SQL* Plus: it retains ... programmer, PL /SQL will pass collection arguments by reference rather than by value. The rationale is that since collections can be large, it is more efficient to pass only a point...

Ngày tải lên: 15/12/2013, 04:15