oracle sql string functions

', -3) from DUAL; 2, Length (c) Returns the length of the specified string. If For example: SELECT LENGTH (' A123 ') from DUAL; Guess what the return value of select LENGTH (') from DUAL; (iv). Date function (DateTime functions) In this type of function, the date is returned except for the value returned by the Months_between. 1, Add_months () returns the value after the specified date month +n, n can b

single-record functions in SQL 1.ASCII Returns the decimal number corresponding to the specified character; Sql> Select ASCII (' a ') a,ascii (' A ') a,ascii (' 0 ') zero,ascii (') space from dual; A A ZERO space --------- --------- --------- --------- 65 97 48 32 2.CHR Give an integer and return the corresponding character;

oracle| Function | conversion | String Oracle Common numerical functions, conversion functions, string functions introduced. numeric function: Absolute value of ABS (m) m MoD (M,n) m is

)function: Returns a string that replaces each character in the appearing from_str with the corresponding character in To_str. Translate is a superset of the functionality provided by replace. If FROM_STR is longer than TO_STR, the characters in From_str and not in To_str are removed from the string because they do not have the corresponding substitution characters. To_str cannot be empty.

Welcome to the Oracle community forum and interact with 2 million technical staff to access single-line string functions for operating string data. Most of them have one or more parameters, and most of them return string ascii () c1 is a

bibliography from the left/right of the string Select Left (' SQL Server Course ', 3), returning the result as "SQL". Select right (' SQL Server Course ', 3) returns the result as "course" 8. Replace function replaces characters in a string Select REPLACE ('

expressionUNICODE (a string that needs to return the first character integer value)' need to return First character The integer value of the string ' is an nchar or nvarchar expression. Example:SELECT UNICODE (' small ')Returns: 23567SELECT UNICODE (' small porter ')Returns: 2356713.Pronunciation Matching degreeSOUNDEX () is used to calculate the pronounced characteristics of a

Tags: code RMI result split share image value Var ETH registrationIt is often used to split a string into a table table, where SQL table-valued functions and CLR table-valued functions are implemented in two ways:SELECT * from FP_EMSDB_PUB.dbo.SqlSplit ('/','1oz/1.5oz/2oz/3oz')The effect is as follows:SQL implementati

SQL Server (c) grouping type conversion functions insert multiple data String functionsMy own study notes, reproduced please indicate the source, thank you!---sauerkraut1.SQL Data grouping----Group by/having① has a student information sheet: STUID/STUNAME/STUAGE/STUGENDER/STUCLASSID;For each class ID and corresponding

String functions are widely used in database application development. The commonly used functions are indexed as follows)1. Str : Converts a number to a character. An optional parameter is used to specify the total length of the result (including the decimal point and the number of digits after the decimal point ). Eg: Select STR (123.45678, 6, 2) 123.45678 is th

Intersect operator returns only the public rows of two queries. The minus operator returns the rows that appear in the second query from the first query result. >select OrderNo from Order_master minus select OrderNo from Order_Detail; 　　　　 　　Join operator The join operator is used to combine multiple strings or data values into a single string >select (venname| | ' The address is ' | | venadd1| | ' ' | | venadd2| | ' ' | | VENADD3) address from Vendo

I. Common formatting functions1. Date Turn stringSelect To_char (Current_timestamp, ' yyyy-mm-dd HH24:MI:SS ')//2017-09-18 22:41:50YYYY: Year (4 and more bits)MM: Month number (01-12)DD: Day of one months (01-31)HH24: Hours of the day (00-23)MI: minutes (00-59)SS: SEC (00-59)2. String Turn dateSelect To_date (' 2017-09-18 ', ' yyyy-mm-dd ')//2017-09-18,to_date function return dateSelect To_timestamp (' 2017-09-18 22:41:50 ', ' yyyy-mm-dd HH24:MI:SS ')

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