RIGHT ( character_expression , integer_expression ) --返回字符串中从右边开始指定个数的 integer_expression 字符。 SUBSTRING ( expression , start , length )--截取字符串 CHARINDEX ( expression1 , expression2 [ , start_locat
If Z is omitted then substr(X,Y) returns all characters through the end of the string X beginning with the Y-th. The left-most character of X is number 1. If Y is negative then the first character of the substring is found by counting from the right rather than the left. If Z is...
charindex('b',@a) --结果:2 2.substring 返回字符、二进制、文本或图像表达式的一部分(截取字符串) substring(@a,1,len($a)) --substring(@a,start,length) 结果:abc789 3.left 返回从字符串左边开始指定个数的字符 left(@a,1) --结果:a left(@a,3) --结果:abc 4.right 返回从字符串右边开始...
sqlite_version() The sqlite_version() function returns the version string for the SQLite library that is running. This function is an SQL wrapper around the sqlite3_libversion() C-interface. substr(X,Y,Z)substr(X,Y) The substr(X,Y,Z) function returns a substring of input string X th...
在SQLite 官方页面(https://sqlite.org/download.html) 下载适合你目标系统的压缩包。 下载并解压后,无论是在 Windows、Linux 还是 Mac OS 系统上,你都可以得到一个sqlite3命令行工具。 以下是在 Mac OS 上解压后得到的命令行工具示例: ➜ sqlite-tools-osx-x64-3450100 ls -l ...
registerFunction("substr",newStandardSQLFunction("substr", StandardBasicTypes.STRING)); registerFunction("substring",newStandardSQLFunction("substr", StandardBasicTypes.STRING)); }publicbooleansupportsIdentityColumns() {returntrue; }publicbooleanhasDataTypeInIdentityColumn() {returnfalse; ...
在SQLite 官方页面[1](https://sqlite.org/download.html) 下载适合你目标系统的压缩包。 下载并解压后,无论是在Windows、Linux还是 Mac OS 系统上,你都可以得到一个sqlite3命令行工具。 以下是在 Mac OS 上解压后得到的命令行工具示例: 代码语言:javascript ...
http://www.sqlite.org/lang_corefunc.html根据官方主页目前没有concat函数有substr ，但是没有concatsubstr(X,Y,Z)substr(X,Y)The substr(X,Y,Z) function returns a substring of input string X that begins with the Y-th character and which is Z characters long. If Z is omitted ...
获取分区的最新的名字 -- 查询最新的分区 create view test_table as select relname,substring(boundary,19,19)::date starttime...='DEFAULT' order by starttime desc ; -- 获取最新的分区信息及相差的天数 select relname,endtime,endtime::timestamp ...
For example, a function that is used to split a string on a delimiter might specify 3 columns: [substring, start_idx, end_idx]. params The names of the parameters the function may be called with. All parameters, including optional parameters, should be listed. For example, a function...