Tags: string splitting clr split"51cto/bbs" ask: SQL is not a string decomposition, a combination of functions?? Original address: http://bbs.51cto.com/thread-1133863-1.htmlProblem Description:VB has two very useful string processing functions:Split (
Select Field 1 from table 1 where field 1. indexof ("Cloud") = 1;
This statement is incorrect because the indexof () function is not an SQL function. You can change it to the corresponding SQL function.
Left () is an SQL function.
Select Field 1 from table 1 where charindex ('cloud', Field 1) = 1;
String
In a SELECT statement, only SQL functions can be used to operate fields (link to SQL Server ),Select Field 1 from table 1 where field 1. indexof ("Cloud") = 1;This statement is incorrect because the indexof () function is not an SQL function. You can change it to the corresponding
Only SQL functions can be used to operate fields in select statements.
String functions perform different operations on binary data, strings, and expressions. This type of function applies to Char, varchar, binary, and varbinary data types, and data types that can be implicitly converted to Char or varchar. You can use
Only SQL functions can be used to manipulate fields in a SELECT statement (linked to SQL Server).Select field 1 from Table 1 where field 1. IndexOf ("cloud") = 1;The reason this statement is not correct is that the indexof () function is not an SQL function, so it can be changed to the corresponding function of SQL.Lef
In developing T-SQL, it is often necessary to perform a variety of operations on strings, and the following describes commonly used string functions. 1. ASCII ASCII code to get charactersThe ASCII code is the standard encoding of the character. To get the ASCII code for a character, you can do so by calling the ASCII function.Syntax structure:ASCII (espression)T
Label:Introduction to commonly used string aggregation (concatenation) functions1.WMSYS. Wm_concatStarting with Oracle 10G support, using the following examples:Select Deptno,wmsys.wm_concat (ename)From EMPGroup BY Deptno;To change the delimiter between characters to another punctuation, add a Replace functionSelect Deptno,replace (Wmsys.wm_concat (ename), ', ', ', ')From EMPGroup BY Deptno;2.LISTAGG (Measu
Only SQL functions can be used in a SELECT statement to manipulate fields (linked SQL Server).Select field 1 from Table 1 where field 1. IndexOf ("cloud") = 1;The reason this statement is not correct is that the indexof () function is not a SQL function, and it can be changed to a
Only SQL functions can be used in a SELECT statement to manipulate fields (linked SQL Server).Select field 1 from Table 1 where field 1. IndexOf ("cloud") = 1;The reason this statement is not correct is that the indexof () function is not a SQL function, and it can be changed to a
Label:The following is excerpted from: http://www.pin5i.com/showtopic-9738.htmlSQL string FunctionsOnly SQL functions can be used to manipulate fields in a SELECT statement (linked to SQL Server).Select field 1 from Table 1 where field 1. IndexOf ("cloud") = 1;The reason this statement is not correct is that the indexo
Only SQL functions can be used to manipulate fields in a SELECT statement (linked to SQL Server).Select field 1 from Table 1 where field 1. IndexOf ("cloud") = 1;The reason this statement is not correct is that the indexof () function is not an SQL function, so it can be changed to the corresponding function of SQL.Lef
String function contents supported by SQL Server:
Copy Code code as follows:
LEN (String) function
LOWER (String) function
UPPER (String) function
LTRIM (String) function
RTRIM (
Tags: replace Oracle function elongOriginal Address--http://blog.csdn.net/qq525099302/article/details/47146537 --Create a split type (used in the function)
Create or replace type Strsplit_type as table of VARCHAR2 ( 4000);
--Create a split function
Create or replace function strsplit (p_value varchar2, p _split varchar2: = ', ')--usage: Select * from table(Strsplit (' 1,2,3,4,5 ') return strsplit_type pipelined is v_idx integer;V_str VARCHAR2 (5
For example, if the column name is no and the type is varchar2, W1 ~ is stored in the 100 rows of data ~ W100.
If the query statement is:
Select * from Table order by no
Press W1, W10, w100, W11, W12 ,......, W2, W20, w21 ,...... .
What if we want to sort data by number?
One solution is to cut off W, convert the remaining number (Note: varchar2 type) to number type, and then sort it.
Here we will first introduce the substr function.
substr
Truncates string
String functions perform different operations on binary data, strings, and expressions. This type of function applies to Char, varchar, binary, and varbinary data types, and data types that can be implicitly converted to Char or varchar. You can use string functions in the select and where clauses and expressions of se
In SQL injection, it is often used to intercept string problems, such as not to echo the case of injection, but also become blind, in this case often need a one-character de-guessing, the process needs to use the intercept string. This article mainly lists three functions and some use cases in the process of this funct
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Character functions supported by Oracle and Their Microsoft SQL Server equivalent functions:
Functions:
Label:String functions are used to perform various operations on characters and binary characters 1.ASCII () function The ASCII (character_expression) function is used to return the leftmost ASCII code value in a string expression. The parameter character_expression must be a string expression of char or varchar type.Eg:select ASCII (' s '), ASCII ('
We know that in the database, the Chinese character occupies two bytes, while the other characters occupy a byte, so the comparison of two functions can determine whether there is Chinese,
Length calculates character lengths, LENGTHB calculates byte lengths;
Select LENGTHB (' A Love China '), Length (' A Love China ') from dual;
The first one returns 7, and the second returns 4, which makes it possible to determine the Chinese language.
Another method
"SOUNDEX" function is the same as the first string of the target string, and the next three characters are the value codes that are worth the consonants. (a vowel is ignored unless the vowel is the first letter.) )Select @name1 as name1, @name2 as name2,--Eg:name1=allen,name2=alanSoundex (@name1) as Soundexname1,soundex (@name2) as Soundexname2,--Soundex (string
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