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How to create and handle composite primary key in JPA
...name = "VERSION")
private Long operatorId;
}
Entity class:
@Entity
@Table (name = "YOUR_TABLE_NAME")
public class Entry implements Serializable {
@EmbeddedId
public EntryKey getKey() {
return this.key;
}
public void setKey(EntryKey id) {
this.id = id;
}
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Oracle SQL escape character (for a '&')
...t the define character to something other than &
SET DEFINE ~
create table blah (x varchar(20));
insert into blah (x) values ('blah&amp');
select * from blah;
X
--------------------
blah&amp
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How can I stop float left?
...iv>.
Then add this CCS:
.row::after {content: ""; clear: both; display: table;}
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SQL is null and = null [duplicate]
...showing a variety of conditions and and their effect as per above.
create table t (x int, y int);
insert into t values (null, null), (null, 1), (1, 1);
select 'x = null' as test , x, y from t where x = null
union all
select 'x != null', x, y from t where x != null
union all
select 'not (x = null)'...
How to convert int to char with leading zeros?
...])) * (1+SIGN(@DesiredLenght-LEN([Column])) / 2) ),
[Column])
FROM Table;
Multiplication by SIGN expression is equivalent to MAX(0, @DesiredLenght-LEN([Column])). The problem is that MAX() accepts only one argument...
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How to remove indentation from an unordered list item?
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display:table-row; will also get rid of the indentation but will remove the bullets.
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Rails select helper - Default selected value, how?
...ue, and once I populated my @project variable with an id from the database table, instead of a title, this code worked appended onto the back of the form.select helper: selected: @project Thank you @danengle
– Christopher Warrington
Jan 27 '18 at 22:17
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Postgres: Distinct but only for one column
I have a table on pgsql with names (having more than 1 mio. rows), but I have also many duplicates. I select 3 fields: id , name , metadata .
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Understanding :source option of has_one/has_many through of Rails
...ular, to represent the model name, instead of :breeds which represents the table name? E.g. has_many :dog_breeds, :through => :dogs, :source => :breed (no s suffixing :breed)?
– LazerSharks
Dec 30 '14 at 22:22
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C compiler for Windows? [closed]
...e problems to handle LibVLC and Gstreamer's. By using MinGW crash the executables. Is there any better solution?
– user285594
Mar 23 '15 at 21:53
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