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ALMIS Database Fundamentals Topics ALMIS Database History Table Layout How to read a table definition Table constraints and Triggers Core Tables Table Load Order Structure Changes ALMIS IS: America’s Labor Market Information System The ALMIS System is: A Joint effort between the Employment and Training Administration of the U.S. Department of Labor and the States to: conduct research, develop products, and deliver Information to job seekers, employers, economic developers, planners and other users. What is the ALMIS Database? In Computer Terminology: The ALMIS Database is a Normalized, Relational Database Structure, Developed for the Storage and Maintenance of Labor Market, Economic, Demographic and Occupational Information. History of the ALMIS Database ALMIS Database Version 1.0 Originated from Two Existing Databases _NOICC’s Occupational Labor Market Information Database or OLMID _North Carolina’s Human Resource Information System Database History continues … - August 1996 : Work Began on the ALMIS Database structure - April 1997: ALMIS Database Structure Version 1.0 Delivered to States - Spring 1997: Formation of the ALMIS Database Maintenance Consortium - Summer 1998: Definition and Release of “Core Tables” under the P/Y 1998 One Stop LMI Grant What Kinds of Information are Included in the ALMIS Database? Some of the Types of Information Which Can be Found in an ALMIS Database Include: - Population - Employment Projections Tax Information - Mass Layoffs Income - Labor Force Estimates Employment - Sales Tax Government Transfer Payments and - much more, such as…... ALMIS Database Structure The table layout for the ALMIS Database: Lookup tables Data tables Crosswalk tables Tables of standard field values Administrative tables Common Relational Database Terms: A Database is a structured collection of data, stored in tables A Table is a collection of records related to one another A Primary Key is a field or combination of fields that uniquely identifies each record in a table A Foreign Key is when a value in one table matches the primary key of another table Common Relational Database Terms Continued: A Data Table is a table consisting of a collection of data records - A Look Up Table is a foreign key table A CrossWalk Table is a table that relates coding structure in the database An Administrative Table is a table that contains information on the data and tables in the ALMIS Database HOW TO READ A TABLE DEFINITION Each table definition contains complete information about the structure of a table. Each definition includes: the name of the table, a complete list of each column name and data type, complete constraint information, and short descriptions of the columns. The following illustration identifies each component of a table definition. List of column names. Data type of column. Name of table. areatype Constraint: Specifies whether this column is part of the Primary Key or participates in one or more Foreign Keys. Numbers in this column refer to Foreign Keys where more detailed information can be found in the Constraints Information section. A table containing identifiers for the geographic type, i.e., MSA, SDA, county, city, township, etc. Column stfips Type char(2) areatype char(2) Constraint Primary Key 1 Primary Key areatyname varchar2(40) Constraints Information 1 Foreign Key references (stfipstb.stfips) Constraints Information: Provides complete information on each Foreign Key used in the table. Each note indicates which table and columns are being referenced. Description State FIPS code The code for the geographical area the data represent. Descriptive title of the areatype Short description of the data intended for this column. Load Order ALMIS Database Structure Changes Version 1.1 to 2.3 Number of Tables Added: 36 Number of Tables Changed: 42 Number of Tables Deleted: 11 Number of Tables Unchanged: 72 New Table Elements in 2.3 from 1.1 For Data Tables That Have Changed: CES: benchmark, suppression Empdb: (several fields changed) ESDATA: stattype, esorders, newapp, referrals INDPRJ: nchg, growcode INDUSTRY: firms, m1emp, m2emp, topempav LABFORCE: benchmark LICHIST: licnumtyp MLSCLAIM: claimtyp MLSEVENT: dwvertype *OESWAGE: (entire table) - new core table New Table Elements in 2.3 from 1.1 **continued** For Data Tables That Have Changed: OCCPRJ: nchg, growcode PROGRAMS: compltyp, progtitle, url SALES: salestyp STFIRMS: lat, long, naicscode, axnaicscd STINDPRJ: nchg, growcode STOCCPRJ: nchg, growcode UICLAIMS: claimtyp, indcode + occcode, agegroup, racethn, gender *URL: (entire table)-new core table WAGE: periodyr, periodtype, period, respondent, empcount Triggers A trigger is a fragment of code that you tell the server to run before or after a table is modified. A trigger has the power to INSERT UPDATE DELETE Why have Triggers? Why have the Occcode & Indcode tables? Can not have conditional foreign keys as was happening in the case of the multi-code fields in many of the ALMIS DB tables. Can not have a foreign key field length that is different than the primary key it is referencing. Trigger Example Action: Insert new soccode “959595” Soccode table Trigger fires! Occcode table Action: Automatically inserts new soccode “959595” Core Data Tables Income Empdb CES Industry Labforce Populatn Wage* Indprj Occprj Iomatrix Income License Oeswage* *Database Administrator may opt to populate one or both of these data tables ALMIS Resource Center Connecticut Florida Georgia Illinois Iowa Massachusetts Montana Nebraska Nevada North Carolina Oregon South Carolina Wisconsin ETA NCSC How to contact ARC: ALMIS Resource Center c/o Employment Security Commission Of North Carolina 700 Wade Avenue Raleigh, North Carolina 27611 Email: [email protected] WWW.almisdb.org