sql expression builder

),@ RegexPattern NVARCHAR (4000) RETURNS BITAs external name RegExCLR. RegExCLR. ClrClass. RegExMatch; OK, after everything is OK, let's test:Select COUNT (1) from Threads where dbo. RegExMatch (ThreadId, '^ [{| \ (]? [0-9a-fA-F] {8} [-]? ([0-9a-fA-F] {4} [-]?) {3} [0-9a-fA-F] {12} [\) |}]? $ ') = 1The above T-SQL is to find out the number of records where ThreadId is GUID in the Threads table. 1 is a match, ^ [{| \ (]? [0-9a-fA-F] {8} [-]? ([0-9a-fA

Match the table name in an SQL statement. The Python regular expression is used for matching. I wanted to build a tool similar to PLSQL, which is not complete yet. Record it first. #-*-Coding: UTF-8-*-import rekeylist = ['access', 'add', 'all', 'alter ', 'and', 'any ', 'as', 'asc', 'audit', 'between', 'by', 'Char ', 'check', 'cluster', 'column', 'comment ', 'companys', 'connect', 'create', 'date', 'date',

nvarchar (4000 ),@ Regexpattern nvarchar (4000) returns bitAs external name regexclr. regexclr. clrclass. regexmatch; OK, after everything is OK, let's test: Select count (1) From Threads Where DBO. regexmatch (threadid, '^ [{| \ (]? [0-9a-fa-f] {8} [-]? ([0-9a-fa-f] {4} [-]?) {3} [0-9a-fa-f] {12} [\) |}]? $ ') = 1The above T-SQL is to find out the number of records where threadid is guid in the threads table. 1 is a match, ^ [{| \ (]? [0-9a-fa-f

　　Lambda expression converted to SQL

expression integrity constraints in SQLSQL constraint is divided into entity integrity, referential integrity, user-defined integrity, delete constraintEntity Integrity 1. Define primary keys Createtable table names when building a table ( snointidentity (sname), nvarchar (), --set Primary key Primarykey (Sno) ) 2. Add primary Key altertable table name addconstraintpk_ table name _sno primarykey (ID) Referential integrity 1. Define foreign keys cre

SQL call Regular Expression Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->Create Function DBO. regexreplace ( @ Source varchar (5000), -- original string @ Regexp varchar (1000), -- Regular Expression @ Replace varchar (1000), -- replace value @ Globalreplace bit = 0, -- whether it is a global replacement @ Ign

date intervalsDECLARE @begin_dateDate= '2014-12-31',@end_dateDate= '2016-12-31'; withGeneratehelpdata as( Select 1 asID,CAST( Case when Right(@begin_date,5)='12-30' Then DATEADD( Day,1,@begin_date) ELSE @begin_date END asDATE) asEndingDateUNION All SELECTId+1 asID, Case when Right(DATEADD(QQ,1, EndingDate),5)='12-30' Then DATEADD( Day,1,DATEADD(QQ,1, EndingDate)) ELSE DATEADD(QQ,1, EndingDate)END a

Tags: SQL basic Regular Expression (23)Using regular expressions in SQL and PL/n Function name Describe Regexp_like Similar to the LIKE operator but performs regular expression matching instead of a simple fuzzy match (condition) Regexp_replace Search and rep

Oracle version: 10.2.0.1 OS: Linux 64-bit Regular expressions are used in SQL: Select count (*) From t Where regexp_like (T. Note, '^ (. | +) * (\ (either \) +', 'I ') The first execution can be performed, the second execution reports ORA-7445, session interruption. The records in the trace file are as follows: Exception signal: 11 (SIGSEGV), Code: 1 (address not mapped to object), ADDR: 0x5e, PC: [0x2a95574358, _ intel_fast_memcpy.a () + 10] * **

Tags: http io os using AR SP data on/* Imitation nature* Personal email: [Email protected]* 2014-10-1*/Lambda expression-to-SQL statement class LibrarySOURCE Download: http://download.csdn.net/detail/xftyyyyb/8044085One, can achieve the functionThis feature class library is primarily provided for the requirements of using lambda expressions in your code, and then the conditional statements that need to be t

specified node to find the set @num =2 -- Specifies the recursive hierarchy, that is, the number of cycles while (@level Using the SQL CTE implementation:DECLARE @node int declare @num intset @node =8;set @num =2;with temp_cteas ( select id,name,parentid,0 LV --Query out "root node", that is, the specified starting node from role_cte where [email protected] UNION ALL Select B.id,b.name,b. Parentid,a.lv+1 from

Label:Inline table-valued functionsIt can be understood that an expression with a parameter view, the advantage is that after creation, can be persisted in the database, query reuse.The format created:Create function name (parameter name as parameter type) return table as CollectionCall Format:SELECT * FROM function name (parameter)Apply operatorCross apply and out apply are similar to crossover and left outer joinsApply is to operate on two input tab

Original: SQL Server Express package usingEncapsulated regular expression for SQL Server invocationNew scalar-valued function name----open database--programmability----scalar-valued functionsUse [Database]GOSET ANSI_NULLS onGOSET QUOTED_IDENTIFIER ONGOALTER function [dbo]. [Scalar value function name](@source ntext,--the original string@regexp varchar (1000),--Re

Label:We know that lambda expressions use the Join function in LINQ to SQL and the Entity framework to implement inner joins, so how can you implement a LEFT join in a lambda expression? The trick is to add a function DefaultIfEmpty function to the join, and in fact this function seems to only translate the inner join into a left join in LINQ, such asvar NewThe returned Joinresult contains db.table1s left j

). DefaultIfEmpty (), (p, c) = = new { p.prodid, p.prodcode, p.prodname, c.categoryname } ); This way, if the amount of data is large, the performance will be poor. Because it will load the products and categories into memory, match, not with SQL left Join Reference article: Https://stackoverflow.com/questions/5

(@inputCalue NVARCHAR (4000), @regexPattern NVARCHAR (4000)) RETURNS BIT As EXTERNAL NAME RegExCLR.RegExCLR.ClrClass.RegExMatch; OK, all OK, after we test it: Select COUNT (1) from Threads where dbo. Regexmatch (ThreadId, ' ^[{|\ (]?[ 0-9a-fa-f]{8}[-]? ([0-9a-fa-f]{4}[-]?) {3} [0-9a-fa-f] {12} [\)|}]? $ ') =1 The T-SQL above is the number of records that find the Threads table ThreadID is a GUID. equals 1 is a match, ^[{|\ (]?[ 0-9a-fa-f

expression, and call slog () to the log file. Copy Code code as follows: $Exec _commond = "(\\s|\\s) * (Exec (\\s|\\+) + (s|x) p\\w+) (\\s|\\s) *"; $Simple _XSS = "(\\s|\\s) * (%3c) |$Eval _XSS = "(\\s|\\s) * (%65) |e) (\\s) * (%76) |v) (\\s) * ((%61) |a) (\\s) * ((%6C) |l) (\\s|\\s) *"; $Image _XSS = "(\\s|\\s) * (%3c) |$Script _XSS = "(\\s|\\s) * (%73) |s) (\\s) * ((%63) |c) (\\s) * ((%72) |r) (\\s) * ((%69) |i) (\\s) * (%70) |

Label:--取第几天的数据。 select*fromtablewheretrunc(sysdate)-trunc(cr)=1; select*fromtablewheretrunc(sysdate)-trunc(cr)=2; select *fromtablewheretrunc(sysdate)-trunc(cr)=8;--获取两时间的相差豪秒数 selectceil((To_date(‘2008-05-0200:00:00‘,‘yyyy-mm-ddhh24-mi-ss‘)-To_date(‘2008-04-3023:59:59‘,‘yyyy-mm-ddhh24-mi-ss‘))*24*60*60*1000)相差豪秒数FROMDUAL; /* 相差豪秒数 ---------- 86401000 1rowselected */--获取两时间的相差秒数 selectceil((To_date(‘2008-05-0200:00:00‘ ,‘yyyy-mm-ddhh24-mi-ss‘)-To_date(‘2008-04-3023:59:59‘,‘yyyy-mm-ddhh24-mi-ss‘