substring function in sql

Create function todayCREATE FUNCTION ' func_get_split_string_total ' (f_string varchar (+), F_delimiter varchar (5)) RETURNS Int (one) BEGIN return 1+ (Length (f_string)-Length (replace (F_string,f_delimiter, '))); ENDError message:ERROR 1418 (HY000): This function has none of the deterministic, NO SQL, or READS

date as an integer value. This section is specified by DatePart. DATEPART (dd, date) is equivalent to day (date) DATEPART (mm, date) equals month (date) DATEPART (yy, date) is equivalent to year (date) The following table lists the DATEPART options and the abbreviations recognized by the SQL Server Compact Edition: Date part abbreviation NBSP; Year yy, yyyy Quarterly QQ, q Month mm, m One day of the year Dy, y Date DD, d Week wk

Select Name,salespersonid from Sales.Store where Name between ' G ' and ' J ' and SalesPersonID > 283 ORDER by Sal Espersonid,name DESC/ASCThe use of the between of this statement is still very innovative, this between is the beginning of G and J between the beginning, do not know what the Chinese characters will be?Group BY, often with the min max sum avg, with the as name alias. The group by Mate aggregation function is commonly used.When Count (col

Tags: identifying group numeric connections Count Sum compression nbsp calculationConnection Query Inner JOIN, with the most, representing more than one table one by one corresponding Aggregation functions Manipulating row data, merging Sum, AVG, COUNT, Max, min Open Window function Distributes the merged data to each row of the original table, which is the equivalent of a column that may be the sum of sums, or the val

Tags: single quote sum requires error ROM tab foreign language nvarchar(ii) SQL statement fuzzy query NULL processing aggregate function My own study notes, reproduced please indicate the source, thank you!---sauerkraut SQL: Structured Query Language (structured Query Language), a standard language for relational database management systems. Sybase and Mircosoft

This function has none of deterministic, NO SQL solution 2011-12-01 14:07:01This function has none of deterministic, NO SQL solutionWhen you create a stored procedureError message:ERROR 1418 (HY000): This function has none of the deterministic, NOSQL, or READS

This is when we open the bin-log and we have to specify whether our function is1 Deterministic indeterminate2 No SQL does not have SQL statements and of course does not modify the data3 READS SQL Data just reads and of course does not modify the data4 modifies SQL data to mo

Original: "SQL" SQL version of the Split function. Used to split a string into a single-column tableFunctionality is similar to the. NET version of the String.Split function, except that. NET returns an array, which returns a single-column table with one row for each split substring. Optional whether to remove empty la

The SQL Server form function is primarily used to handle the rowset defined by the over clause, primarily for parsing and processing Running totals Moving averages Gaps and Islands Let's look at a simple application-rank the order form information by order from highest to lowest Use TSQL2012 go SELECT OrderID, OrderDate, Val, RANK () over (order by Val DESC) as Rnk Sales.orde

' Gallery_name ' = ' Youth ',' Mid ' =>4,' Create_time ' =>147258369,' Image ' = ' uploade/image3.jpg '),Array' Gallery_name ' = ' The love of her ',' Mid ' =>5,' Create_time ' =>147258369,' Image ' = ' uploade/image4.jpg '));$where 1= ' gallery_name= ' good world ' or mid=4 and create_time$where 2=array (' Gallery_name ' and ' The Good world ',' Mid ' =>array (' or ', 4),' Create_time ' =>array (' ' Image ' =>array (' like ', '%upload% '),' ID ' =>array (' in ', Array (2,3,4,5)));$order = Array

Tags: style blog http ar color OS using SP strongSource: SQL Drip 32-excel concatenate function generates SQL statementWhen you get an Excel, you need to insert this data into the database, what to do, in addition to using the SSIS data import can also use the CONCATENATE function in Excel, this is a bit tricky, the fi

Tags: technical SQL function too share span current time fun tar strongHere are a few more useful examples: First, take a look at the use of this function from MSDN, the COALESCE function (hereinafter referred to as the function), and return a non-null value for a parameter.

Paip. program function time performance optimization and SQL statement Optimization Author attilax,1466519819@qq.com Tracking Tool xdebug ..1 Profiler log analysis tool wincachegrind.2 Obtain the complete SQL statement from the code for testing...2 Test SQL statement time...2 Disable

function | Statement Set Rs=server.createobject ("Adodb.recordset") On Error Resume Next Sql= "SELECT * from Your_table" Rs. Open SQL, Conn Rsname=rs (0). Name For i = 1 to RS. Fields.count-1 ' RSNAME=RSNAMEAMP;CHR (9) rs (i). Name rsname=rsname "," rs (i). Name Next RSNAME=RSNAMEAMP;CHR (13) Rs.close Set rs=nothing Conn.close Set conn=nothing

Create FUNCTION InsertComp (@ in varchar (30 ))RETURNS varchar (30)ASBEGINDeclare@ Pos int,@ Count int,@ Result varchar (30 ),@ Len intSet @ result = @ in-- The position before the pointSet @ pos = CHARINDEX ('.', @ result)-1If (@ pos =-1) set @ pos = len (@ result)Set @ count = @ pos-3While (@ count> = 1)BeginSet @ len = len (@ result)-@ countSet @ result = left (@ result, @ count) + ',' + substring (@ result, @ count + 1, @ len)Set @ count = @ count

First, the basic concept: SQL functions can contain any number of queries, but the function only returns the result of the last query (which must be a select). In simple cases, returns the first row of the last query result. If the last query does not return any rows, the function returns a null value. If you need this funct