SQLite has a number of tabular output modes. One of these is called table mode.
Below is an example of using table mode to output SQLite’s query results as a table.
Add Weeks to a Date in PostgreSQL
In PostgreSQL, we can use the + operator to add one or more weeks to a date. We have a few options when it comes to specifying the actual number of weeks.
4 Tabular Output Modes in SQLite
The SQLite command line interface provides us with several options for outputting our results in tabular format.
These can be set using the .mode command. You simply type .mode followed by the desired output format.
Below are examples of the various tabular modes available in SQLite.
2 Ways to Return Rows that Don’t Contain Numeric Values in Oracle
The following examples return only those rows that don’t contain any numeric digits in a given column in Oracle Database.
2 Ways to Return the Unix Timestamp in SQLite
The unix timestamp is the number of seconds since 1970-01-01 00:00:00 UTC. SQLite provides us with a couple of ways to get the unix timestamp.
Fix “ERROR: each INTERSECT query must have the same number of columns” in PostgreSQL
When using PostgreSQL’s INTERSECT operator, if you encounter an error that reads “ERROR: each INTERSECT query must have the same number of columns“, it’s because there’s a mismatch in the number of columns returned by the queries on either side of the INTERSECT operator.
The way to fix this is to ensure that both SELECT statements return the same number of columns.
SQLite Renames PRINTF() to FORMAT()
SQLite has introduced the FORMAT() function, which can be used to format strings.
More precisely, it has actually just renamed its SQL PRINTF() function to FORMAT(). The reason is for better compatibility with other DBMSs. The original PRINTF() name is retained as an alias for backwards compatibility.
The FORMAT() function (or its naming) was introduced in SQLite 3.38.0, which was released on 22 February 2022.
2 Ways to Delete Duplicate Rows in MariaDB (Ignores Primary Key)
Here are examples of removing duplicate rows from a table in MariaDB when those rows have a primary key or unique identifier column.
The examples delete duplicate rows but keep one. So in the case of two identical rows, it deletes one of them and keeps the other.
Get the First Monday of a Month in SQLite
SQLite’s DATE() function provides us with the ability to return the date of the first instance of a given day of a given month. Therefore, we can use it to return the first Monday of a given month. We can also use it to return the first Tuesday, Wednesday, Thursday, Friday, etc.
We can use DATETIME() if we want a datetime value to be returned.