DECLARE @string_to_trim varchar(60) 1. SET @string_to_trim = ' Five spaces are at the beginning of this 1. string.' 1. SELECT 'Here is the string without the leading spaces: ' + 1. LTRIM(@string_to_trim) 1. GO 1. 下面是结果集: --- 1. Here is the string without the lead...
SELECTLEFT(Name,5)FROMProduction.ProductORDERBYProductID; GO B. Using LEFT with a character string The following example usesLEFTto return the two leftmost characters of the character stringabcdefg. SQL SELECTLEFT('abcdefg',2); GO Here's the result set. ...
str: String expression to operate on. Can be a constant, column, or function, and any combination of string operators. Related functions initcap,upper Viewlowerquery example lpad Pads the left side of a string with another string to a specified string length. lpad(str,n[,padding_str]) Argum...
B. Using LEFT with a character string The following example uses LEFT to return the two leftmost characters of the character string abcdefg. SELECT LEFT('abcdefg',2) GO Here is the result set. -- ab (1 row(s) affected) See Also ...
Oracle数据库中是没有left() 和right() 函数的,若想按照DB2中对应的函数去使用,自己新建两个function即可,方法如下 LEFT CREATEORREPLACEFUNCTION"LEFT" (strinvarchar2,sublenininteger)returnvarchar2isstrleninteger;beginstrlen :=length(str);ifsublen<=0thenreturn''; ...
create function [dbo].[lpad](@s nvarchar(255),@length int,@char char(1)) returns nvarchar(255) as begin declare @fullstring nvarchar(255) --填充后的字符串 declare @fillstring nvarchar(255) --填充的字符串 declare @filllen int --填充的长度 ...
(1)upper(string):将字符串转换为大写 SELECT upper(prod_name) FROM products; 1. (2)lower(string):将字符串转换为小写 SELECT lower(prod_name) FROM products; 1. 2、查询产品表,返回产品名称的前三个字符/后三个字符 (1)left(string,n):返回字符串左边的n个字符 ...
joinLateral算子,会将外部表中的每一行,与表函数(TableFunction,算子的参数是它的表达式)计算得到的所有行连接起来。 而leftOuterJoinLateral 算子,则是左外连接,它同样会将外部表中的每一行与表函数计算生成的所有行连接起来;并且,对于表函数返回的是空表的外部行,也要保留下来。
If pad is not specified, str will be padded to the left with space characters if it is a character string, and with zeros if it is a byte sequence. lpad(str, lenl,padl)-返回str,用pad左填充到len的长度如果str比len长,则返回值缩短为len字符或字节。如果未指定pad,如果是字符串,str将在...
SQLRETURN SQLGetInfo( SQLHDBC ConnectionHandle, SQLUSMALLINT InfoType, SQLPOINTER InfoValuePtr, SQLSMALLINT BufferLength, SQLSMALLINT * StringLengthPtr); 参数 ConnectionHandle [输入] 连接句柄。 InfoType [输入]信息类型。 InfoValuePtr [输出]指向要在其中返回信息的缓冲区的指针。 根据所请求的 InfoT...