oracle sql functions

SQL single-line functions in Oracle databases-character FunctionsThis learning is about character functions.Character FunctionsCharacter functions can also be divided into case-insensitive conversion functions and character processing functions.Case-sensitive conversion func

Tags: calculate high-precision modified address EFI struct arithmetic uname table structureSQL queries and SQL functions 　　This chapter aims 　　　　Understanding Oracle Data Types Understanding Data Definition Languages and data manipulation languages Understanding Transaction Control Languages and Data Control languages Mastering

I. oracle basic SQL statements and functions, and oraclesql Functions I. Data Definition Language (ddl) Data definition language (ddl) is used to change the database structure, including creating, changing, and deleting database objects. The Data Definition Language commands used to manipulate the table structure inclu

PL/SQL single-line functions and group functionsA function is a program that has 0 or more parameters and has a return value. Oracle has built a series of functions in SQL, which can be called SQL or PL/

Oracle Database SQL single-row functions-date functionsPrefaceThe date functions of the Oracle database are very powerful and relatively large. I will sort it out for future reference.. Convenience for yourself and convenience for others!Common date functions1. Sysdate: curr

SQL single-row functions in Oracle databases-continued character FunctionsI practiced some character functions in the previous blog, and then I went to the next blog to read the relevant materials.The character function has not been practiced yet. This time, we mainly perform some supplementary exercises on some unused

Mathematical functions of Oracle SQL functionsABS (x) "function" returns the absolute value of x "parameter" x, numeric Expression "return" numeric SQL> SELECT ABS ( -), ABS (- -) from DUAL; ABS ( -) ABS (- -)---------- ---------- - -Sign (x) "function" returns the positive negative value of X "parameter" x, nu

few weeks of each yearTo_char (sysdate, ' mm ') the first few months of each yearTo_char (sysdate, ' Q ') the first quarter of each yearTo_char (sysdate, ' yyyy ') yearSql> Select To_char (sysdate, ' PM yyyy-mm-dd hh24:mi:sssss AD year Mon day ddd iws ') from DUAL;To_char (sysdate, ' Pmyyyy-mm-ddh--------------------------------------------------------------------------------Morning 2008-03-27 09:58:35917 A.D. thousand eight March Thu 087 13Sql> SELECT to_char (Systimestamp, ' HH24:MI:SS. FF5 '

Oracle pl/SQL common functions, oracleplsql Functions On csdn, I also saw a post called Oracle common function 110. after a rough look, there are many data calculations, such as covariance. I don't think I have used much. I can see it today, but it is not very comprehensive.

],c3]) "function" converts a string X to a numeric type "parameter" c2,c3, character type, reference To_char () "Return" number string "reverse" to_char (DATE[[,C2],C3]) "Example" SelectTo_number ('199912'), To_number ('450.05') fromdual; To_multi_byte (C1) "function" converts half-width in a string to full-width "parameter" C1, character "return" string "Example" SQL>SelectTo_multi_byte ('High A') text fromdual; test--High A To_single_byte (C1) "func

SQL date functions -- DATEADD-- Returns a new datetime value based on a specified date.-- DATEADD (datepart, number, date)-- Abbreviation of date-- Year yy, yyyy-- Quarter qq, q-- Month mm, m-- Dayofyear dy, y-- Day dd, d-- Week wk, ww-- Hour hh-- Minute mi, n-- Second ss, s-- Millisecond MSSELECT dateadd (mm, 5, '2014/1/8080') as date -- DATEADD-- Returns a new datetime value based on a specified date.-- D

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SQL single-row functions in Oracle databases-numeric Functions1. trigonometric FunctionsSIN ASIN SINHCOS ACOS COSHTAN ATAN TANHFor the above trigonometric functions, see the name. Do a continuous exercise [SQL] select sin (2), asin (1), SINH (1) from dual;Select cos (1), ACO

the return value VAR salary number; exec:salary:=get_sal (7369); PRINT salary; Mode two: Call function directly in SQL statement SELECT get_sal (7369) from DUAL; way three: Use Dbms_output call function SET serveroutput on EXEC Dbms_output.put_line (' Wages are: ' | | get_sal (7369));Delete functions drop function get_sal; Create a PackageA package is a PL/