Table testsql_comments.issues
information related to check outs or issues

Generated by
SchemaSpy
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Primary key columns
Columns with indexes
Excluded column relationships
< n > number of related tables
 
Column Type Size Nulls Auto Default Children Parents Comments
issue_id int 10  √ 
primary key for issues table
borrowernumber int 10  √  null
borrowers
foreign key, linking this to the borrowers table for the patron this item was checked out to
itemnumber int 10  √  null
items
foreign key, linking this to the items table for the item that was checked out
date_due datetime 19  √  null datetime the item is due (yyyy-mm-dd hh:mm::ss)
branchcode varchar 10  √  null
foreign key, linking to the branches table for the location the item was checked out
returndate datetime 19  √  null date the item was returned, will be NULL until moved to old_issues
lastreneweddate datetime 19  √  null date the item was last renewed
renewals tinyint 3  √  null lists the number of times the item was renewed
auto_renew bit 0  √  0 automatic renewal
auto_renew_error varchar 32  √  null automatic renewal error
timestamp timestamp 19 CURRENT_TIMESTAMP the date and time this record was last touched
issuedate datetime 19  √  null date the item was checked out or issued
onsite_checkout int 10 0 in house use flag
note mediumtext 16777215  √  null issue note text
notedate datetime 19  √  null datetime of issue note (yyyy-mm-dd hh:mm::ss)

Table contained 0 rows at Mon Jul 16 09:22 NZST 2018

Indexes:
Column(s) Type Sort Anomalies
issue_id Primary key Asc  
borrowernumber + timestamp Performance Asc/Asc  
branchcode Performance Asc  
borrowernumber Performance Asc  
itemnumber Must be unique Asc This unique column is also nullable
itemnumber Performance Asc  

Close relationships  within of separation: