What is the meaning of select * in SQL?
The SQL SELECT statement returns a result set of records from one or more tables. A SELECT statement retrieves zero or more rows from one or more database tables or database views. ORDER BY specifies an order in which to return the rows. AS provides an alias which can be used to temporarily rename tables…
The SQL SELECT statement returns a result set of records from one or more tables. A SELECT statement retrieves zero or more rows from one or more database tables or database views. ORDER BY specifies an order in which to return the rows. AS provides an alias which can be used to temporarily rename tables or columns.Click to see full answer. Consequently, what is the meaning of * in SQL?(*) == means all {till here code means include all from the database.} FROM == It refers from where we have to select the data. example_table == This is the name of the database from where we have to select data. the overall meaning is : include all data from the databse whose name is example_table.Also, how do you write a select statement in SQL? SELECT statements An SQL SELECT statement retrieves records from a database table according to clauses (for example, FROM and WHERE ) that specify criteria. The syntax is: SELECT column1, column2 FROM table1, table2 WHERE column2=’value’; Similarly one may ask, what is a select query? A select query is a database object that shows information in Datasheet view. A query does not store data, it displays data that is stored in tables. A query can show data from one or more tables, from other queries, or from a combination of the two.What does count (*) mean in SQL?The SQL COUNT() function returns the number of rows in a table satisfying the criteria specified in the WHERE clause. It sets the number of rows or non NULL column values. COUNT() returns 0 if there were no matching rows. Syntax: COUNT(*) COUNT( [ALL|DISTINCT] expression )
