Programmer Think

/******************* postgresql database test starts***********************/   --This test is based on pg database version 10.11 postgres=# select version();                            version -------------------------------------------------------------  PostgreSQL 10.11, compiled by Visual C++ build 1800, 64-bit (1 Row record) --Create a ...

In some cases, the Index needs to be pre processed or post processed ID mapping By default, faiss will record an order id(1,2,3...,) for each input vector. You can also specify any required id for the vector in use. Some index types have add_with_ids method can correspond to a 64 bit id for each vector and return the specified id when searchi ...

preface Querying the same data, after using Order by and limit, may have a hundred times impact on the query results and time-consuming. Optimizing SQL is not only to optimize those slow queries with more than 1 second, but also those with ultra-high frequency of 0.1 second. Here, I simulated and created a table limit_table And initialize the ...

Abstract: This paper mainly introduces several proposals that have entered stage 4, which are expected to be gradually incorporated into the standard in 2022. This article is shared from Huawei cloud community< 8 new JavaScript features you should try in 2022 >, author: front end picker. Since the joint release of JavaScript by Netscape a ...

Hello, I'm Chen Cheng~Today, I'd like to share the index settings of 8 common pandas1. Convert index from group by operation to columnThe group by grouping method is often used. For example, add a grouping column team to group.>>> df0["team"] = ["X", "X", "Y", "Y", "Y"] >>> df0           A         B         C team 0  0.548012  ...