To create a table in SQLite, use the CREATE TABLE statement.
This statement accepts the table name, the column names and their definitions, as well as some other options.
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Create a Temporary Table in SQLite
When you create a table in SQLite, you can create it as a permanent table or as a temporary table.
When you create a table in a database that you’ve created, that would be a permanent table. A temporary table is created in the temp database.
To create a temporary table, you use the same syntax as creating a regular table. The difference is that you use either the TEMP or TEMPORARY keyword. You can also (or alternatively) prefix the table name with temp, which indicates that it will be created in the temporary database.
Attach a Database in SQLite
When using SQLite, you can use the ATTACH DATABASE statement to add a database file to the current database connection.
When you do this, you attach a database file name and provide a name for the database. If the file exists it will be attached with your chosen name, otherwise it will be created and attached with your chosen name.
Extract the Month from a Date in PostgreSQL
In PostgreSQL you can use the EXTRACT() function to get the month from a date.
You can also use the DATE_PART() function to do the same thing.
Convert Month Number to Month Name in PostgreSQL
You can use the following code examples in PostgreSQL if you have a month number but you want the month name instead.
Convert Month Name to Month Number in PostgreSQL
In PostgreSQL, if you already have a month name, but you want to convert that name to the month number, you can do this with the EXTRACT() function.
Get the Month Name from a Date in PostgreSQL
If you’re familiar with PostgreSQL, you might know that you can use the EXTRACT() and the DATE_PART() functions to extract the month from a date. But those functions only allow you to extract the month number.
What if you need the month name?
You can get the month name from a date by using the TO_CHAR() function. This function returns a string based on the timestamp and the template pattern you provide as arguments.
How to Use GOTO in SQL Server
In SQL Server, you can use GOTO to alter the flow of execution. You can use it to “jump” to another part in the T-SQL code.
The way it works is, you create a label, then you can use GOTO to jump to that label. Any code between GOTO and the label are skipped, and processing continues at the label.
GOTO statements and labels can be used anywhere within a procedure, batch, or statement block. They can also be nested.
Difference Between sys.sql_modules, sys.system_sql_modules, & sys.all_sql_modules in SQL Server
In SQL Server the sys.sql_modules, sys.system_sql_modules, and sys.all_sql_modules system catalog views return metadata about SQL language-defined modules in SQL Server.
However, there is a difference between them.
Difference Between Local and Global Temporary Tables in SQL Server
When you create a temporary table in SQL Server, you have the option of making it a local or global temporary table.
Here’s a quick outline of the main differences between local temporary tables and global temporary tables.