Analyzing a retail chain's sales from a ClickHouse database. Analyzing public data on road accidents in Russia.
rtrim — Strip whitespace (or other characters) from the end of a string.
{ size_t end = s.find_last_not_of(WHITESPACE)
So we do another trick to convert this var char list into an array with this very long function
For instance, a user is going to select (x choose y) checkboxes. 1) So you have to convert it into simple String using convertArrayToString(String
If boost is an option then you can use boost::algorithm::join. For example to print out a vector of std::string
Самоучитель SQL. Синтаксис операторов SELECT, INSERT, UPDATE, DELETE в примерах и задачах.
String Functions: ASCII Char Charindex Concat Concat with + Concat_WS Datalength Difference Format Left LEN Lower Ltrim Nchar Patindex Quotename Replace
50 mysql> SELECT ASCII('dx'); -> 100. См. также функцию ORD().