In PostgreSQL,jsonbis a data type used to store JSON (JavaScript Object Notation) data in a more efficient and optimized binary format. It is an extension of the json data type. jsonb stands forJSON binary. It provides several advantages over the standard json type, especially when it comes...
That causes problems and unhappiness in the long run. In this article, I will try to point out good and bad uses of JSON in PostgreSQL, and provide you with guidelines that you can follow. A bad example This data model exemplifies everything that you can do wrong: 1 2 3 4 5 6 7 ...
PostgreSQL provides aJSONarray data type which is similar to standard arrays in programming. It helps us store ordered collections in JSON format. JSON arrays are enclosed within square brackets “[ ]” and can have different data types like strings, objects, numbers, etc. Postgres offers several...
PostgreSQL supports JSON data types, making it a powerful tool for handling semi-structured data within a relational database. This functionality allows you to store, query, and manipulate JSON documents in PostgreSQL tables. Using JSON functions and operators, you can extract data from JSON columns...
Most databases offer many proprietary features besides the known SQL standard. One example isPostgreSQL’sJSONBdata typewhich allows you to store JSON documents efficiently in a database column. You could, of course, store the JSON document in a text column. That column type is part of the ...
问PostgreSQL -How在where子句中使用jsonb_array_lengthEN数据库优化: 1.可以在单个SQL语句，整个应用程序...
PostgreSQL Basics How to Insert How to Update How to Delete How to Trim Strings How to Use substring() How to Use substring() with RegEx to Extract a String How to Replace Substrings How to Modify Arrays How to Compare Arrays How to Concatenate Strings How to Convert the Case of a Stri...
You know this data sitting in a PostgreSQL database that you have always wanted to export to a JSON file? SELECT * FROM people WHERE meaning_of_life = 42; -- id | name | meaning_of_life -- ---+---+--- -- 1 | Alice | 42 -- 2 | Bob | 42 -- (2 rows) Because Postgr...
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array_to_json takes a PostgreSQL array and returns a single JSON value. The exported data is saved to the current working directory in a file named users.json. However, sometimes we only want to export a subset of the columns — first_name, last_name, email— instead of the complete ...