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Introduction to SQL. This tutorial provides an introduction to the Structured Query Language (SQL), learn how to create t... create table, create, select, insert, update, delete, drop, drop table, recycle bin, purge. 1,237 296,147. 8.7 years ago Mike Hichwa (Oracle) Script.
Introduction to SQL. This tutorial provides an introduction to the Structured Query Language (SQL), learn how to create t... create table, create, select, insert, update, delete, drop, drop table, recycle bin, purge. 1,235 295,980. 8.7 years ago Mike Hichwa (Oracle) Script.
Use this site to teach about SQL and PL/SQL. Your students are given access to a new schema within an Oracle database each time they access Live SQL. As they run SQL and PL/SQL, each statement in the session is recorded and the last 10 sessions are stored for use. Any session can be saved permanently and saved scripts can be replayed, annotated ...
2024 Oracle · Live SQL 24.1.3, running Oracle Database 19c EE Extreme Perf - 19.17.0.0.0 · Database Documentation · Ask Tom · Dev Gym
Scalar subqueries return one column and at most one row. You can replace a column with a scalar subquery in most cases. For example, to return a count of the number of bricks matching each colour, you could do the following: select colour_name, (. select count(*) from bricks b. where b.colour = c.colour_name. group by b.colour.
LIVESQL_LAST_SQL_ID is a bind variable specific to Live SQL. Only use this in Live SQL. Normally you'll want to pass NULL or a SQL ID instead. Passing NULL gets the plan for the last SQL statement run in this session. Using a SQL ID searches for plans in the cursor cache for that statement.
Oracle Database 23c extended CASE expressions in PL/SQL to support dangling predicates in simple CASE expression. These work like regular simple CASE expressions - you have a single selector. Each WHEN clause may contain a comparison condition and the right-hand side of the formula.
