teradata instr

When I was working on a project over the past few days, I used the instr function of Oracle to solve the problem of user group permission allocation. Now I have a good idea about this function. In OraclePLSQL, The instr function returns the position of the string to be truncated in the source string. Syntax: instr (string1, string2 [, start_position [, nth_appe W

Instr and like are all functions implemented by Oracle. In strict terms, instr is an internal function and like is an SQL standard, which is highly efficient. However, I do not know how to implement them yet. But both Instr and like are all functions implemented by Oracle. In strict terms, instr is an internal function

Brief description today when writing SQL, the ID in table A is stored according to the tree structure. Now it is necessary to connect with the node_id in table B and take out the information that node_id in B can connect to the node_id of any level in a. However, the node_id in table B specifically corresponds to which level in table A is unknown. For this, the first thought is to use or operation, but because the efficiency is too low, the speed is very slow, later using

1, Regexp_like function is powerful, but the efficiency is worse than like; 2, if the use like field without index, and match the string before and after the%, then InStr efficiency; 3, if the use of like fields with the index, and matching the string before and after the%, if only the operation of the index field is like high efficiency, if there are other fields is InStr efficient, the possible reason i

Label: InStr (title, ' manual ') >0 equivalent to title like '% manual% ' InStr (Title, ' Handbook ') =1 equivalent to title like ' Handbook% ' InStr (title, ' manual ') =0 equivalent to title not a like '% manual% ' There are nearly 11 million data in the T table, and many times we want to do string matching, in SQL statements we usually use like to reach our se

Tags: instr (source string, target string, start position, match ordinal) in Oracle/plsql, the INSTR function returns the position of the string to intercept in the source string. It is retrieved only once, that is, from the beginning of the character to the end of the character. syntax as follows: InStr (string1, string2 [, Start_position [, Nth_appeara

INSTR (source string, target string, start position, match ordinal) In Oracle/plsql, the InStr function returns the position of the string to be intercepted in the source string. Retrieves only once, that is, from the beginning of the character to the end of the character. The syntax is as follows: InStr (string1, string2 [, Start_position [, Nth_appearance]])

InStr (Title, ' Handbook ') >0 equivalent to title like '% manual% ' InStr (Title, ' Handbook ') =1 equivalent to the title like ' Manual% ' InStr (Title, ' Handbook ') =0 equivalent to title not like '% manual% ' There are nearly 11 million data in the T table, and many times we want to do string matching, in SQL statements, we usually use like to achieve our

INSTR (source string, target string, start position, matching serial number)In Oracle/PLSQL, The instr function returns the position of the string to be truncated in the source string. It is retrieved only once, that is, from the start of the character to the end of the character.Syntax:Instr (string1, string2 [, start_position [, nth_appearance])Parameter Analysis:String1Source string to be searched in thi

Tags: string return def and insurance essay exp where displaySelect Riskcode,outriskcode,riskname,suppliercode, (select min (inputdate) from Fccont where Innercontno in (select Innercontno from Fcpol where Riskcode=t.riskcode and Biztype= ' "and Corporation in (' 1137000003 ', ' 1137000004 '))) from Mr ISK T where Riskname in (' Allianz Anconfore Insurance B ', ' Allianz Super-split insurance dividend type ') and substr (suppliercode,0,4) in (' 1060 ', ' 1052 ', ' 1050 ', ' 1031 ', ' 1037 ', ' 1

Tags: start SQL string ACL example find other application error NG2INSTR (source string, target string, starting position, matching ordinal):In Oracle/plsql, the InStr function returns the position of the string to intercept in the source string. It is retrieved only once, that is, from the beginning of the character to the end of the character.first, the syntax is as follows:InStr (string1, string2 [, Start_position [, Nth_appearance]])1> parameter A

The format of the INSTR method is INSTR (source string, target string, start position, matching serial number), for example: INSTR ( The format of the INSTR method is INSTR (source string, target string, start position, matching serial number), for example:

InStr function Returns the position of the first occurrence of a string in another string. InStr([start, ]string1, string2[, compare]) Parameters Start Options available. A numeric expression that sets the starting position for each search. If omitted, the search begins at the position of the first character. If start contains Null, an error occurs. If you have specified compare, you must have the start arg

name SELECT SQL_ID,PIECE,SQL_TEXTFROM V$SQLTEXT_WITH_NEWLINESWHERE SQL_ID IN(SELECT SQL_IDFROM V$SQLTEXT_WITH_NEWLINESWHERE SQL_TEXT LIKE '%table_name%')ORDER BY SQL_ID,PIECE;Three statements starting with the DELETE statement are found to identify the variables by the statement ID. select * from v$sql_bind_capture where sql_id in ('fpkt91ujqu853'); Gquw3xgbqvu13: delete from paynum p where instr (: 1, ',' | PL_ID | ',')> 02014-3-12 17:44:13, 3249, b

The following articles mainly introduce how to use the Oracle Instr () and decode () functions correctly to perform combined queries with multiple conditions, in related systems, we often encounter queries with combinations of multiple conditions to be processed, using the implementation methods of instr () and decode () functions. The following describes the functions and syntax of

Oracle function INSTR usage: (source string, target string, start position, matching serial number) in OraclePLSQL, The instr function returns the string to be truncated in the source string Oracle function INSTR usage: (source string, target string, start position, matching serial number) in Oracle/PLSQL, instr funct

For example: There are nearly 11 million data in the t table, many times we want to do string matching, in SQL statements, we usually use like to achieve our search goals. However, the actual test found that the efficiency of like differs considerably from the InStr function. Here are some test results: sql> Set timing on sql> select COUNT (*) from T where InStr (title, ' Manual ') >0; count (*)

Instr usage in Oracle:The format of the instr method isInstr (source string, the string to be searched, starting from the nth character, to find the nth matching serial number)Returns the location found. If not, 0 is returned.For example, in instr ('upgrade floor ', 'or', 3, 2), the source string is 'upgrade floor', and the string is 'or ', search for "or" from t

Usage of instr in Oracle:The format of the InStr method isINSTR (The source string, the string to find, starting with the first few characters, to find the ordinal number of matches)Returns the location found, or 0 if it is not found.For example: INSTR (' CORPORATE FLOOR ', ' or ', 3, 2), the source string is ' CORPORATE FLOOR ', look for ' or ' in the string, lo

Implementation of Oracle's INSTR function MySQLIn a migration project, the instr function of MySQL can only find whether the child string is in the parent string. Here I wrote one for migration. Of course, here I only focus on migration, and may not fully implement the details of the original function.Oracle uses the following calls several times, SQL> select instr