having holes - ορισμός. Τι είναι το having holes
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Τι (ποιος) είναι having holes - ορισμός

SQL CLAUSE
HAVING

Law of holes         
  • alt=Photograph of a backhoe that is over fifty percent submerged in a large hole that it dug in a peat bog before falling in.
ADAGE
Healey's first law of holes; Wikipedia:FIRSTLAWOFHOLES; First rule of holes; First Rule of Holes; Stopping digging; First law of holes; Stop digging; 1st rule of holes; Law of Holes; First Law of Holes; The first law of holes
The first law of holes, or the law of holes, is an adage which states: "if you find yourself in a hole, stop digging." It is used as a metaphor, warning that when in an untenable position, it is best to stop making the situation worse.
Having (SQL)         
A HAVING clause in SQL specifies that an SQL SELECT statement must only return rows where aggregate values meet the specified conditions.
Having (inlet)         
  • The Having, view from Moritzburg
RÜGEN ISLAND, GERMAN
Having (bay)
The Having is an inlet in the northeast of the Rügischer Bodden, the northern half of the Bay of Greifswald, which cuts deeply into the peninsula of Mönchgut, the southeastern tip of the German island of Rügen.

Βικιπαίδεια

Having (SQL)

A HAVING clause in SQL specifies that an SQL SELECT statement must only return rows where aggregate values meet the specified conditions.

HAVING and WHERE are often confused by beginners, but they serve different purposes. WHERE is taken into account at an earlier stage of a query execution, filtering the rows read from the tables. If a query contains GROUP BY, rows from the tables are grouped and aggregated. After the aggregating operation, HAVING is applied, filtering out the rows that don't match the specified conditions. Therefore, WHERE applies to data read from tables, and HAVING should only apply to aggregated data, which isn't known in the initial stage of a query.

To view the present condition formed by the GROUP BY clause, the HAVING clause is used.

Παραδείγματα από το σώμα κειμένου για having holes
1. DBS involves having holes drilled in your skull and electrodes placed in the brain –– while you are awake –– to control the tremors.