在PostgreSQL中,FIND_IN_SET是一个在MySQL中常用的函数,用于查找一个字符串是否存在于一个以逗号分隔的字符串列表中,并返回该字符串在列表中的位置。然而,PostgreSQL默认并不包含这个函数。以下是关于如何在PostgreSQL中实现类似FIND_IN_SET功能的详细解答: 1. FIND_IN_SET函数的用途和功能 FIND_IN_SET函数主要用于...
使用like可能查到我们不想要的记录，它比like更精准，这时候mysql的FIND_IN_SET函数就派上用场了，...
The unnest function expands an array into a set of rows, enabling you to apply standard SQL search conditions on the resulting set. You can also use this result to filter records in the main query, as in this example: Copy 1 SELECT * 2 FROM books 3 WHERE 'Thriller' IN (SELECT unnest...
In addition to theREPLACE()andREGEXP_REPLACE()functions, PostgreSQL also provides anotherTRANSLATE()for string replacement. Given asetcharacter,TRANSLATE()function withnew_setalternative characterssourcestring matchessetany character. TRANSLATE(source, set, new_set); TheTRANSLATE()function accepts three p...
What I don't understand is how to make 9317 and 9138 a unit that I can see if the pair exists in any other decks. I know there is a CONCAT function, but I'm not sure how to CONCAT two different rows like this. Or more simply I want to find the count of all pa...
- Use a subquery in the WHERE clause. - Within the subquery, each row of a result set will have a unique integer value assigned by the ROW_NUMBER() function. - Subquery will return the duplicate records except for the first row.
How to set default value in materialize autocomplete input? I am using ASP .NET MVC for my web application. I am using materialize theme (css and js) for UI. I want autocomplete input and with materialize syntax it,s working perfectly. But I want to select fir......
# (Please note that in the following comments, it is assumed that <Your Path> # points to the root directory of the include directory of PostgreSQL.) # Then you have three options. # 1) After CMake runs, set PostgreSQL_INCLUDE_DIR to <Your Path>/include and # PostgreSQL_LIBR...
PostgreSQL String Function Exercise, Practice and Solution: Write a query to find the details of those employees who contain eight or more characters in their first name.
update"statusTable"set"Status_Column"=truewhere(selectmax("t1")-min("t1")asdifferencefrom"Table_1_Furnace_1" )>100; Written this way, a select query effectively becomes a scalar expression and can thus be used in contexts where expressions are allowed. In this case, you can use it ...