When it comes to prepending a values to arrays in PostgreSQL, we have a number of options available to us. Below are four methods we can use to prepend a value to an array in PostgreSQL.
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Fix Error “Either the parameter @objname is ambiguous or the claimed @objtype (INDEX) is wrong” in SQL Server
If you’re getting SQL Server error Msg 15248 that reads something like “Either the parameter @objname is ambiguous or the claimed @objtype (INDEX) is wrong’“, it appears that you’re trying to perform an operation on an index, but you’ve got the naming syntax slightly wrong. Perhaps you’re trying to rename it.
When we do stuff like rename an index, we need to include the table name when referring to the existing index. It’s possible that you’ve not included this in your code.
To fix this issue, be sure to include the table name.
Continue readingTips and Tricks for Working with JSON Data in SQL Server
JSON (JavaScript Object Notation) has become a ubiquitous data format for storing and exchanging information. SQL Server 2016 and later versions provide robust support for working with JSON data. This article explores some useful tips and tricks for handling JSON in T-SQL.
Continue readingHow to Delete an Index in SQL Server
If you find yourself with an index in SQL Server that you no longer need, you may decide to disable it, or you may opt to get rid of it altogether. That way you can declutter your database, free up space, and perhaps help improve performance of updates to the data.
Typically, to delete an index in SQL Server, we use the DROP INDEX statement. There are cases where we might drop it via other means (for example, if it’s implemented as part of a PRIMARY KEY or UNIQUE constraint – also shown below), but DROP INDEX is usually the go to command for such operations.
Fix Error 159 “Must specify the table name and index name for the DROP INDEX statement” in SQL Server
If you’re getting SQL Server error 159 that reads “Must specify the table name and index name for the DROP INDEX statement“, it’s probably because you’re trying to drop an index without specifying the table name.
When we drop an index, we must specify both the index name and the table name.
To fix this issue, include both the index name and the table name in your DROP INDEX statement.
Using the WHERE Clause Effectively: Common SQL Operators and Their Usage
The WHERE clause is a fundamental part of SQL queries that allows us to filter data based on specific conditions. Understanding how to use various operators within the WHERE clause can significantly enhance our ability to retrieve precisely the data we need.
This article explores some of the operators that are most commonly used with the WHERE clause.
Fix Error 11415 “Object … cannot be disabled or enabled. This action applies only to foreign key and check constraints” in SQL Server
If you’re getting SQL Server error 11415 that reads something like “Object ‘UQ_Employees_Email’ cannot be disabled or enabled. This action applies only to foreign key and check constraints“, it’s probably because you’re trying to disable either a DEFAULT, UNIQUE or PRIMARY KEY constraint.
Nested WHILE Loops in SQL Server: A Beginner’s Guide with Examples
WHILE loops are a fundamental concept in T-SQL programming, allowing us to execute a block of code repeatedly as long as a specified condition is true. Nested WHILE loops take this concept further by placing one WHILE loop inside another, enabling more complex iterations.
This guide will walk you through the basics of nested WHILE loops in SQL Server, complete with simple examples and a demonstration of the BREAK statement.
SQL Self Join Examples
In SQL, the self join is a join technique where we join a table with itself. Other join types will join a table with another table, but the self join simply joins with itself.
Self joins can be useful when working with hierarchical or recursive data within a single table.
Continue readingFix Error 1987 “Cannot alter nonclustered index … because its clustered index is disabled” in SQL Server
If you’re getting SQL Server error 1987 that reads something like “Cannot alter nonclustered index ‘UQ_Employees_Email’ on table ‘Employees’ because its clustered index is disabled“, it’s probably because you’re trying to rebuild a nonclustered index when the clustered index for the table is disabled.
To fix this issue, either enable/rebuild the table’s clustered index first, then try again, or enable all indexes at once.
The clustered index will typically be the primary key index (unless you’ve specified another clustered index for the table).
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