MySQL provides us with a bunch of functions that can modify JSON values. Here are ten functions that we can use to modify JSON values in MySQL.
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6 Ways to Extract JSON Data in MySQL
In MySQL, we have several options when it comes to extracting data from JSON documents. Below are six methods we can use to do this.
Generate a Range of Sequence Numbers in SQL Server (sp_sequence_get_range)
In SQL Server, we can use the sp_sequence_get_range stored procedure to generate a range of sequence numbers from a sequence object.
Fix “WRONGTYPE Operation against a key holding the wrong kind of value” when using ZADD in Redis
If you get an error that reads “WRONGTYPE Operation against a key holding the wrong kind of value” when using the ZADD command in Redis, it’s probably because you’re trying to update a key that contains the wrong data type.
To fix this issue, be sure to only use the ZADD command against sorted sets if the key already exists. If the key doesn’t already exist, then you shouldn’t get this error.
7 Functions that Create JSON Values in MySQL
MySQL includes some inbuilt functions that can be used to create JSON values, such as JSON arrays, JSON objects, or a quoted string literal.
Here are seven functions that allow us to create JSON values in MySQL.
How to Order a Query in SQL Server when using a Sequence to Number the Results
One common use case for sequences in SQL Server is to use them to number the results of a query. For example, we can add a column that has a number that increments with each row, similar to a row counter (but with a sequence that we define).
Fix Error Msg 220 “Arithmetic overflow error for data type…” in SQL Server
If you’re getting error msg 220 that reads something like Arithmetic overflow error for data type…, it’s probably because you’re trying to convert a value to a data type that can’t handle that value. For example, trying to convert a number to a smallint but the number’s too big to fit into a smallint.
To fix this issue, make sure you convert the value to a data type that can handle the size of the number that you’re trying to convert.
How to Add a Root Element when using FOR XML in SQL Server
If you’re using FOR XML in SQL Server to output your query results as XML, you might find yourself in the situation where the XML returned has no root element. Fortunately adding a root element is easy, as I’ll show you in this article.
3 Ways to Unquote a JSON Value in MySQL
In MySQL, we have several options when it comes to removing the quotes from a JSON value.
For example, normally if we return a string value from a JSON document, we would get that value along with its quotes. But sometimes we might not want the quotes. Below are three methods we can use to unquote a JSON value in MySQL.
Fix “MINVALUE (…) must be less than MAXVALUE (…)” When Creating a Sequence in PostgreSQL
If you’re getting an error that reads something like “MINVALUE (1) must be less than MAXVALUE (1)” in PostgreSQL when you’re trying to create a sequence, it’s probably because your sequence’s minimum possible value is higher than the maximum value.
To fix this issue, be sure that the sequence’s maximum value is greater than the minimum value.