Explain the factors that need to be considered for creating an index on a specific table column.

SQL script which is the physical design for this database   ### Animals This table contains the following data about all animals in the zoo. - animal ID (primary key) - animal name - animal birthdate - species - habitat (foreign key) [1 habitat to many relationship]   ### Habitats This table contains data about the habitats in the zoo.  Each animal lives in a specific habitat.  The habitat table should include the following data - habitat name, foreign key) - habitat location   ### Database CREATE DATABASE zoo;     Write queries to create the tables. Be sure to include primary keys for each table and the required foreign keys and referential integrity actions.   Add appropriate indexes. This database requires at least 2 indexes in addition to those automatically created by MySQL.

Computer Science PHP - SQL

SQL FOR THERES TABLES

A specific command is required in order to copy data inside tables as well as copy data across tables.

Copying and pasting data across tables requires the use of a specific command.

question Design a SOQL query with inline soql to display the Account history data. Design the history Query for account. Salesforce Development, Query, SOQL

Which of the following is not true about PIVOT() queries   Group of answer choices the base query can retrieve data using an extensive set of INNER JOINS the base query can JOIN a maximum of three tables the base query can be used to pre-process data such as using a GROUP BY()   the base query can be used to change the column names that will be displayed

Excel Tables - Structured Reference What does the "@" symbol represent in a Structured Reference to an Excel table? OPTIONS: A reference to the header row of the table A reference to the entire table of data A reference to the current column of the table A reference to the current row of the table

JANUARY DATA MANAGEMENT SHORTAND NOTATION FOR RELATIONAL SQL TABLES Notation Underlined Example Meaning The attribute(s) is (are) a primary key The attribute(s) is (are) a foreign key referencing relation R CREATE TABLE R A or A, B A cany SQL type>, B cany SQL type>, C cany SQL type>, D cany SQL type>, E cany SQL type>, A or A", B* Superscript name of relation PRIMARY KEY(A), As an example, the schema FOREIGN KEY (E) REFERENCES S(F) ): R(A, B, C, D, E') S(E, G, H) CREATE TABLE S F , G cany SQL type>, H cany SQL type>, PRIMARY KEY(F)) corresponds to the following SQL tables: EXERCISE Consider the following relational schema, representing five relations describing shopping transactions and information about credit cards generating them [the used notation is explained above]. SHOPPINGTRANSACTION (Transld, Date, Amount, Currency, ExchangeRate, CardNbrREDITCARD, StoreldSTORE) CREDITCARD (CardNbr, CardTypeCARDTYPE, CardowneroWNER, ExpDate, Limit) OWNER (Ownerld, Name, Surname, BirthDate,…