How can I use SQL to filter out equal values in cryptocurrency databases?

3 answers

• Mar 24, 2022 · 3 years ago
  You can use the DISTINCT keyword in your SQL query to filter out equal values in a cryptocurrency database. For example, if you have a table called 'transactions' and you want to select only unique values from the 'amount' column, you can use the following query: SELECT DISTINCT amount FROM transactions. This will return only the unique values in the 'amount' column, removing any duplicates.
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• Mar 24, 2022 · 3 years ago
  To filter out equal values in a cryptocurrency database using SQL, you can use the GROUP BY clause. For instance, if you have a table called 'trades' and you want to select only the unique values from the 'symbol' column, you can use the following query: SELECT symbol FROM trades GROUP BY symbol. This will group the rows by the 'symbol' column and return only the unique values, eliminating any duplicates.
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• Mar 24, 2022 · 3 years ago
  One way to filter out equal values in a cryptocurrency database using SQL is to use the ROW_NUMBER() function. This function assigns a unique number to each row in a result set. You can then use this function in a subquery to filter out duplicate values. For example, if you have a table called 'prices' and you want to select only the unique values from the 'price' column, you can use the following query: SELECT price FROM (SELECT price, ROW_NUMBER() OVER (PARTITION BY price ORDER BY price) AS rn FROM prices) AS sub WHERE rn = 1. This query will return only the unique values in the 'price' column, removing any duplicates.
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