How to Properly Concatenate Strings in SQLite?

String Concatenation in SQLite: Unveiling the Mystery

SQLite, a widely adopted relational database management system, offers a wealth of functions for data manipulation. However, users may encounter unexpected behaviors when attempting to concatenate strings within SQL queries. This article delves into the issue of string concatenation and provides a solution based on the official SQLite documentation.

Problem Statement:

In an attempt to execute a SQLite replace function using a field's value, a user employs the following query:

select locationname + '<p>' from location;

Surprisingly, the result is a list of zeros instead of the expected string combination. This inconsistency arises from the incorrect usage of the concatenation operator.

Solution:

To concatenate strings effectively in SQLite, it is crucial to utilize the || operator, which is specifically designed for this purpose. By replacing the with ||, the query becomes:

select locationname || '<p>' from location;

Justification:

As per the SQLite documentation, the || operator performs string concatenation, combining the two strings specified as its operands. In this particular case, it joins the locationname field's value with the literal string '

'.

Conclusion:

Understanding the correct syntax for string concatenation in SQLite is essential to avoid unexpected results. By adhering to the prescribed || operator, users can manipulate strings effectively and harness the full potential of SQLite's data processing capabilities.

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