However, we have a lot of other department data. Ok, here we want just the clerks and analysts in dept 10. I like the 'IN' clause when selecting different data from the same column. Hint: wrong syntax! I’m not sure why this works, but it does this is the correct syntax. What is wrong here? Notice I asked where DEPTNO = 10 or 20 but I have some DEPTNO 30s in this list. The IN Clause is far more efficient than using the 'OR' clause in this instance. Listed above are the main Where Clause conditions. Where Clauses allow for selectivity of the data being returned. A semi-colon denotes the end of a SQL statement. This is good practice, especially if you are going to put more than one SQL statement into a single SQL Editor session. Notice my SQL always ends with a semi-colon. It works anywhere in the SQL Editor window and is signaled by the space bar. Perhaps just as easy as the table drag and drop out of the Navigation Manager. You didn't have to type in long column names or anything else. I hit the 'Enter' key to get these out, and see below, Toad Data Point includes the columns in the order that you clicked on them, and includes the commas between each. I hold down the key and click on multiple columns. You can see in this illustration that useful functions also appear in the pick list. IF you include the FROM clause, the insite pick list will include just columns from that table, as shown below. Insites allows for automatic popups of useful table data to appear. I'd like to illustrate another cool feature of TDP: Toad Insites. This part will cover more of the SELECT and WHERE clauses for a single table access.
This learning series will cover all of these topics. This is the rough railroad syntax for a SQL SELECT statement. SELECT * or column name įROM table name or Please note that unless there is an ORDER BY clause (covered in the next part of this series), there is no guarantee that the rows will be returned in any particular order at all. The data will be returned (roughly) in the order in which it was added to the table. The columns will be listed in the order that they appear in the database table structure. Since there is no WHERE clause, this SQL will return all of the table data from the named table. The 'SELECT *' selects all the columns from the table identified in the FROM clause. SELECT identifies the columns to be included, and the FROM clause is the data table or another SQL statement that returns data. The basic SQL syntax are the SELECT and FROM clauses. This blog will focus on the following areas of the SQL query language using Traditional Toad Data Point: I will make reference to specifics for the Oracle and SQL Server, RDBMS, but the focus will be the SQL language. This series will utilize Toad Data Point and its Local Storage. The better you know SQL basics, the better you can perform your job by being able to access relational data using the SQL language, or by tweaking the SQL produced by Query Builder.