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SQL is a tool that is widely used in the manipulation of data and featuring in the relational database. They are applied in querying, manipulating as well as reporting data and it is commonly used by ...

在使用MySQL进行模糊查询的时候，很自然的会用到like语句。通常情况下，在数据量小的时候，不容易看出查询的效率。但在数据量达到百万级、千万级的时候，查询的效率就很容易显现出来。这个时候查询的效率就显得很重要！ 一般情况下like模糊查询的写法为 ...

How to Extract a Substring in Excel Using FIND() and MID() Functions Your email has been sent Learn how to use MID() and FIND() and then combine them to parse substrings from inconsistent data.

I have a column of data with values resembling this: HL7_Result_for_Message_ID_123Q324343.hl7 I need to grab that ID number (in bold), the challenge being that it can be any and all lengths. I have ...

Every keyboard has a set of Function Keys F1-F12 on the top row; however, the old computer sets used to have these keys gathered on the left side of the keyboard. While every function key caters ...

library(dbplyr) translate_sql(substring('abcdefghijklmno', 6,7)) #> Expected: <SQL> substring('abcdefghijklmno', 6, 7) #> Actual: <SQL> substring('abcdefghijklmno', 6 ...