oracle sql functions

Date formatting functions for SQL Server functionsFor some of the students who write SQL Server execution statements, date Format function of the mastery and application is very important, today we mainly to enumerate some of the commonly used date-time format function, see below:We can execute a new query through SSMS to see the results of the execution; In fact

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 string,Returns a four-character string,And the first character of the return value is always the first character in

Method 1: As we all know, to connect to Oracle using PL/SQL, you need to install the Oracle client software. Have you ever wondered whether to directly connect to Oracle without installing the Oracle client? In fact, I always wanted to do this, because this client is so

function returns a null value of NULL. This article introduces the functions and usages of various mathematical functions. Back to top 1. Absolute function abs (x) and return pi function pi () ABS (x) returns the absolute value of x, Pi () returns the values of Pi Eg:select abs (2), ABS ( -3.3), ABS ( -33), Pi (); The absolute value of a positive number is itself, the absolute value of 2 is 2, the absolute

Feel that some netizens always put forward some very basic questions, for example, there is no function to achieve such functions ah, what is the function of Ah, what the format is, and so on, but also feel their understanding of the lack of Oracle function, so focused on the remainder of the time to focus on the Oracle function, small heart is afraid to be conce

Sales.fn_salesbystore (602); For multi-statement table-valued functions, at BEGIN ... The body of the function defined in the END statement block contains a series of Transact-SQL statements that generate rows and insert them into the table that will be returned. The following example creates a table-valued function. This function has an input parameter EmployeeID and returns a list of all employees that

: MI: SS 'yyyy', 'mm', 'dd', 'hh12', 'hh24', 'mi', and 'ss; ■ Changing the date format in DB2: Current timestamp 'current date', 'current time', and so on; NOTE 2: ■ Changing the Data Type of SQL Server to "data type parameters": int and varchar; ■ Oracle Data Type Change functions: to_char (), to_date (), to_number (), and so on; ■ DB2 data type change

Single-row numeric Functions A single-row numeric function operates on numeric data and performs mathematical and arithmetic operations. All functions have numeric parameters and return numeric values. The operands and values of all trigonometric functions are radians rather than degrees. Oracle does not provide built-

Oracle note (5) single-row functions although each database supports SQL statements, each database also has the operation functions supported by each database. These are single-row functions, if you want to develop a database, you need to learn more

SQL stored procedures often need to call some functions to make the processing process more reasonable and make the function more reusable. However, you may find that when writing SQL functions, some functions are written under the table value function and some are written u

Tags: style blog http io ar color OS sp strongOriginal: "T-SQL Series" Common functions-aggregate functionsAggregation functionsAverage AVG, standard deviation Stdev, variance var, max Max, Min min, total sum, count of times, max-min, coefficient of variation stdev/avg*100What is statisticsStatistics is the process of inferring the overall characteristics through sample characteristics.Similar to gambling,

Oracle tablespace to view SQL usage, oracle tablespace SQL In daily work, the most important thing for DBA is to check the usage of the tablespace to check whether the tablespace is full. The procedure is as follows: Step 1: Open PLSQL Step 2: Create an SQL window Step 3: E

Today, I am working on an OA report. I use a stored procedure to calculate some data. When doing a for xxx in xxxx loop end loop; loop, I never knew it was Mao. I can't catch the no_data_found exception in for any more. Once this no_data_found Oracle occurs, it automatically jumps out of the for loop, but I don't know what went wrong, that was depressing for an hour. Shit. Later I remembered that pl/SQL too

Today, I am working on an OA report. I use a stored procedure to calculate some data. When doing a for XXX in xxxx loop end loop; loop, I never knew it was Mao. I cannot catch the no_data_found exception in for any more. Once this no_data_found occurs Oracle will automatically Jump Out Of The for loop, but I don't know where the error occurred. It was a depressing hour. Shit. Later I remembered that PL/SQL